Best heads for sbc 350

The Edelbrock #60909 Performer cylinder head is designed for 302, 327, 350 and 400 cid small-block Chevy engines up to 1986. This cylinder head includes your choice of 64cc (In order to retain stock compression ratio on 1970 and earlier small-blocks) or 70cc combustion chambers and high flow intake and exhaust ports. A Complete head includes larger-than …

Best heads for sbc 350. Even a small low boost blower will typically give you 40% to 50% more power. So if you have a 200 hp engine, you will get 300. Obviously as the base power goes up, this rule no longer holds. But for most basically stock engines, a blower will give you 40 to 50% more power.

Oct 21, 2009 · The 1003 is a wire bead gasket and will probably work, it's just not the correct gasket. The bore size is going to be real close, and the wire bead is not flattened and will leave an impression in the surface of the head. A 1034 would be the correct gasket to use for a 4.155 bore and has a pre-flattened ring.

The Flotek Cylinder Head is made with high-quality materials. It is assembled with precision. The valve sizes are ideal for small block Chevy engines. The chamber size is also a good fit. The springs are straight and of good quality. 3. Straight Aluminum Bare Cylinder Head Compatible with Chevy Small Block 302 or 327 or 350 or 383 or 400 SBC ...New Trends in Head Design. Besides this new generation of hybrid heads, cylinder head makers have thrown convention to the wind and have come up with radical …The standard length of aftermarket SB Chevy pushrods are 7.796" long but may vary slightly depending on the manufacturer. The preload on SB Chevy hydraulic flat tappet lifters can be adjusted correctly with pushrods that are from 7.776" to 7.816" long. Standard hydraulic lifters have .125" total plunger travel.When purchasing the assembled heads, you get Manley stainless-steel intake and exhaust valves (with wither 7- or 10-degree retainers), your choice of 1.250-, 1.437- or 1.550-inch valve springs to complement the camshaft design your engine is utilizing, Viton valve seals, hardened spring cups, a Dart two-piece guide plate, and ARP rocker arm ...Summit Racing™ Precision Cast Cylinder Head SUM-162LS210CATH. Chevy LS Cylinder head, 210cc Cathedral port Intake Runner, 64cc Chamber, 2.02 Intake Valve 1.6 Exhaust Valve, 3.898+ bore sizes, Max .600 Lift Ea. Part Number: SUM-162LS210CATH.The intake face of a Vortec head is cut at a slightly different angle than the First-Generation SBC heads and ... we lowered the intake on top of our Vortec heads and ... 350: 4,600: 410: 360:

Brodix has recently fired up its small-block cylinder head machine with a series of new heads. The newest is the Fast Burn 1000 series of 23-degree heads that features a 196cc intake port with 2.02, 2.05, and 2.08- inch …An easy way to gain 20-40 horsepower on any 1955 and newer Small-Block Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling) is by installing a set of Vortec cylinder heads. These value-priced cast-iron cylinder heads use modified combustion chambers and high-velocity port technology to provide improved performance.A Small-Block 350 Crate Motor Gains 117 HP With Basic Bolt-Ons. Marlan Davis writer Ed Taylor photographer. ... Six Ways the Gen V Chevy Small-Block Head Is the Best SBC Ever. Brandan Gillogly ...There are lots of contributors to engine surge, the carb can or not be one of them. The old saying that "most carburetor problems are electrical" meaning distributor still holds a lot of truth. Most formulas will tell you 600 to about 610 CFM for a 6000 RPM 350 engine. So a 650 which is a common size is in range.1 day ago · Cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, Chevy, 302, 327, 350, 400, Each. Part Number: SUM-152123 4.82 out of 5 stars 367 posts · Joined 2004. #11 · Jan 5, 2008. hotrod3z said: go to www.northernautoparts.com and check out the classic 350 rebuild kit it comes with everything to rebuild a 350 cam pistons everything u need for $150.00 no joke then all u have to pay for is machine work.Crate Engine, Dressed, Long Block, 383 Stroker, 436 HP, 443 TQ, New Block, Aluminum Heads, 750 cfm Carburetor, Chevy, Small Block, Each Part Number: MLL-BP38318CTC1D 4.94 out of 5 stars ( 36 )

With more than 15 inches of vacuum and 175-180-psi cranking compression with either head, this setup is optimal for an entry-level, 10:1, 355ci small-block Chevy. 2. Magnum 280H-10. The second ...#1 · Feb 12, 2008. Hey everyone. I have a small block 350 bored 60 over. I am looking to buy a new set of heads, cam, and intake for this engine. I would like to have a rough idle cam …Intake runner volume, bowl volume and design, chamber design. The old heads were made for a 327ci engine, not anything bigger. 72 Nova- LS 370 88mm turbo 4 link. 99 Transam-LS 370 76mm turbo. 71 Chevelle slow 350 building a LS 5.3.Top 7 Best Aluminum Heads For Small Block Chevy Review. 01. Edelbrock 5089 Cylinder Head – Best Small Block Chevy Cylinder Heads. Highlighted Features. 64 cc Combustion Chamber Volume. 02 cc/60 cc Intake, Exhaust Runner Volume. 02 inches/1.6 inches Intake, Exhaust Valve Diameter. 562 inches Deck Thickness. Complete Pair for …

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These heads appeared on 327 and 350 cubic inch engines across most of the 1960s ... Six Ways the Gen V Chevy Small-Block Head Is the Best SBC Ever. Brandan Gillogly | Mar 7, 2024.Promo. Speedmaster®. Chevy SBC 350 Straight Solid Roller CNC Cylinder Head Top End Engine Combo Kit. No Reviews yet. MPN: PCE435.1012 UPC: 840136553571 Extended Warranty Eligible. US $1,620.50 US $2,315.00. You Save US $694.50 (30%)Single Points Earn 1621 Points. Build to Order. Quantity.I used Crower 66282H-16 lifters with standard Jesel SB 2.2 rockers. The push rod lengths ended up being BBC +.100", with heads that were milled ~.070" and a standard deck ht. Dart Little M block. I had the cam custom ground by Cam Motion with a .900" base circle, to aid in connecting rod clearance (4 rods still had to be clearanced).Product Model RACING STREET/STRIP Engine Displacement (cu.in.) 350 Engine Family CHEVROLET - Small Block V8 Material 2618 Forged Aluminum Base Bore (in) 4.000 + .030 Stroke (in) 3.48 Rod Length (in) 5.7 Compression Height (in) 1.575 Top Type RD dish Top Net Head Volume (cc) -10cc D-cup dish Deck Thickness (in) 0.280 Wrist Pin …DNA Motoring CYLH-SBC-350 Aluminum Bare Cylinder Head Compatible with SBC Engines 302, 327, 350, 383. 4.3 out of 5 stars. 51. $233.51 $ 233. 51. FREE delivery Fri, Feb 23 . ... Top subscription boxes – right to your door: PillPack Pharmacy Simplified: Amazon Renewed Like-new products you can trust :The problem these heads then bring is the plug is off on the far side of the head and with a 350 bore diameter results in a long burn just like 1970-1980 era 350 smog heads, which therefore wants, but now can't tolerate, more spark lead for best power.

Edelbrock 7501 Performer RPM Air-Gap Intake Manifold. Best small block Chevy performance heads. Its dual-intake design allows this small block Chevy head to … A cast-iron block with four-bolt main caps is the foundation for the 350 HO, which is topped with iron Vortec heads fitted with 1.94/1.50-inch valves. Its durable rotating assembly has aluminum pistons delivering a 9.0:1 compression ratio. A Small-Block 350 Crate Motor Gains 117 HP With Basic Bolt-Ons. Marlan Davis writer Ed Taylor photographer. ... Six Ways the Gen V Chevy Small-Block Head Is the Best SBC Ever. Brandan Gillogly ...chevy 350 small block performance cylinder heads. these cylinder heads have the following: 283, 305, 327, 350, 383 & 400 applications. converted 305 castings #416, 434, 450 & 601. 64cc combustion chamber. 170cc intake runner. all heads come with stainless .160 ex & .202 in valves. steam holes drilled for 400 applications no charge. all …Mar 29, 2021 · Cylinder Heads for a 400-Equipped Chevy Truck. The Trick Flow 23-degree 195cc intake port heads are a great choice for a street-driven small-block 400 or even a 350. The smaller intake port will generate excellent velocity which will help with throttle response and still make great power. (Image/Summit Racing) Description. Chevy 350 TBI Aluminum Cylinder Heads 2.02/1.60. THESE CYLINDER HEADS HAVE THE FOLLOWING: NEW HI-FLOW Aluminum 64CC cylinder heads. 190CC intake ports. Vortec design combustion chamber. TBI style intake manifold bolt pattern. Angle or Straight plug design. Raised intake roof for enhanced air flow. Extra …Are you looking for a rental property near you? Finding the right place can be a daunting task, but with the right resources and information, you can get a head start on your searc...Head-Flow DataRHS 220cc intake-runner Pro Action heads equipped with 2.02/ 1.60 valves were flowed at 28 inches of water by Sherman on his SuperFlow bench. ... 350-based block with a 3.75-inch ...Air Canada has some good deals to Beijing and Shanghai during the months of February and March 2020. Round-trip economy fares are as low as $350 per person. Update:Some offers ment...Run with a stock cam and two-barrel Rochester carb, the mild 350 produced 246 hp and 364 lb-ft of torque. When all was said and done, we had a stone-stock, two-barrel 355 with a stock cam that ...Aug 31, 2021 ... TOP 5 Best Camshafts for Stock 350 Chevy - ... -for-lq4-with-317-heads/ - ... How to Remove / Install a Camshaft in a Small Block Chevy (EASY SWAP) ...Work on the Nigeria Startup Bill started earlier in 2021 and has involved investors, startups and government representatives. A bill to formalize relations between startups and reg...

Mar 29, 2021 · Cylinder Heads for a 400-Equipped Chevy Truck. The Trick Flow 23-degree 195cc intake port heads are a great choice for a street-driven small-block 400 or even a 350. The smaller intake port will generate excellent velocity which will help with throttle response and still make great power. (Image/Summit Racing)

Top 7 Best Aluminum Heads For Small Block Chevy Review. 01. Edelbrock 5089 Cylinder Head – Best Small Block Chevy Cylinder Heads. Highlighted Features. 64 cc Combustion Chamber Volume. 02 cc/60 cc Intake, Exhaust Runner Volume. 02 inches/1.6 inches Intake, Exhaust Valve Diameter. 562 inches Deck Thickness. Complete Pair for … Find CHEVROLET 5.7L/350 Chevy small block Gen I AFR 195cc SBC Eliminator Street Heads and get Free Shipping on Orders Over $109 at Summit Racing! AFR 195cc SBC Eliminator Street Heads are fully CNC-machined (combustion chamber, intake, and exhaust ports) and available in your choice of straight or angled plug versions. AFR 195cc heads feature a 75cc or 65cc combustion chamber with a 64cc ... SBC 350 Pistons; SBC 383 Pistons; SBF 347 Pistons; SBF 408/427/434 Pistons; Power Steering & Accessories. Chevy Power Steering Pumps; Roller Rockers. Aluminum; …You need springs, valves, retainers, locks and stem seals to finish them out. Shortest distance between these head’s in a box to on an engine is a Competition Products head improvement kit, there’s a bunch to choose from. Aftermarket aluminum heads typically use valve that has .1 inch longer stem as the casting thicknesses are greater …Top 7 Best Aluminum Heads For Small Block Chevy Review. 01. Edelbrock 5089 Cylinder Head – Best Small Block Chevy Cylinder Heads. Highlighted Features. 64 cc Combustion Chamber Volume. 02 cc/60 cc Intake, Exhaust Runner Volume. 02 inches/1.6 inches Intake, Exhaust Valve Diameter. 562 inches Deck Thickness. Complete Pair for …With more than 15 inches of vacuum and 175-180-psi cranking compression with either head, this setup is optimal for an entry-level, 10:1, 355ci small-block Chevy. 2. Magnum 280H-10. The second ...Jun 10, 2017 · techinspector1. Don't know anything about those heads, but the best flowing heads for the money will be Profiler aluminum heads. With supporting components, it's pretty easy to make 500/500 with 195cc intake runners on a 383. Under $1200 for the set, complete. I have not read too much about them but they are import heads like the procomp heads ...

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The 1003 is a wire bead gasket and will probably work, it's just not the correct gasket. The bore size is going to be real close, and the wire bead is not flattened and will leave an impression in the surface of …Nov 9, 2008 · Intake runner volume, bowl volume and design, chamber design. The old heads were made for a 327ci engine, not anything bigger. 72 Nova- LS 370 88mm turbo 4 link. 99 Transam-LS 370 76mm turbo. 71 Chevelle slow 350 building a LS 5.3. (Kitco News) - Kitco aficionados, it is now time to have your say in where you think gold prices are heading in the short-term.Read more on 'Kitco' Indices Commodities Currencies S...Customer’s Choice: the Best Rated Head Gaskets for Aluminum Heads. 175 users answered this survey. Please help us improve this review! 20% of users selected Evergreen HSHB2000, 65.71% selected Fel-Pro HS 26415 PT-1, 2.86% selected ACDelco 12622033, 2.86% selected MAHLE 54450A and 8.57% selected Cometic H1796SP7051S.If you want to do more, spend about two hours opening up the exhaust valve throat to 90 percent of the exhaust valve diameter (1.5 x 0.90 = 1.35-inch diameter). This will help horsepower above ...Aug 31, 2021 ... TOP 5 Best Camshafts for Stock 350 Chevy - ... -for-lq4-with-317-heads/ - ... How to Remove / Install a Camshaft in a Small Block Chevy (EASY SWAP) ...A Small-Block 350 Crate Motor Gains 117 HP With Basic Bolt-Ons. Marlan Davis writer Ed Taylor photographer. ... Six Ways the Gen V Chevy Small-Block Head Is the Best SBC Ever. Brandan Gillogly ...#1 · Apr 3, 2020. guys, need help spending my stimulus check. 66 chevelle, 3.55 gears m20 4 speed, flat top 350 with a Elgin.420 performer type cam. 750 vacuum secondary holley, …Hot rod enthusiasts can attest to the popularity of the Turbo 350 transmission. The TH350 (Turbo Hydromatic 350) was a transmission developed in a joint venture between Buick and C...Gas prices have fallen below $3 a gallon in nearly half of the US as demand slows heading into the Christmas holiday season. The average price for a gallon of gas has dropped below...Head of household is a filing status that Missouri recognizes for taxpayers who must file in the state. While they may seem similar, the tax filing single versus head of household ...Mar 10, 2009 · A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! ….

There are lots of contributors to engine surge, the carb can or not be one of them. The old saying that "most carburetor problems are electrical" meaning distributor still holds a lot of truth. Most formulas will tell you 600 to about 610 CFM for a 6000 RPM 350 engine. So a 650 which is a common size is in range.ive got a mid 70s 350 in the chevelle. Did rings bearing and for the heads, I just hand lapped the valves, new seals and called it done. it runs good, smokes a bit on start up. locally a guys got A pair of edelbrock e street heads 64cc. I'm sure these are better than the high mileage smog heads on the car now.Jul 2, 2019 · Clearwater Cylinder Head Inc. (CCH) is a reputable, experienced (over 25 years) dealer. We specialize in providing quality and warranty-backed rebuilt cylinder heads for a variety of vehicles (cars, trucks, boats, etc). With a massive online catalog, you can easily view our inventory of Chevy 350 cylinder heads. Don’t go out and buy a 1 7/8 inch primary tube header for your street driven 350, which is what is commonly considered overkill. Not only that, it can actually rob your engine of power. Most of our techs agree that a street application 350 will benefit well from a header with 1 1/2” to 1 5/8” diameter primary tubes and 2 1/2 or 3 inch ...These heads are good for a minimum 50hp gain. ... The odds of getting a GOOD set that will work in a SBC is slim so I have been just cranking fuel pressure up on the 350 injectors on most SBC applications. Those making 375hp or …The factory 461 iron casting SBC 327 heads, also referred to as “double-hump” heads, were the best that GM offered at the time. Though most of these heads had 1.94“/1.5” valves, the L76 327 and L84 327 versions were opened up with 2.02”/1.60” valves for better flow.Nov 18, 2019 · Just torque them down as per the instructions, and watch out for the tiny (yes tiny) tab with the note the side to install nearest the push rods. No leaks for me now. Steve. 1971 Malibu Sport Coupe 350 (Lunati Voodoo 20120711 cam) / 350 / 3.31 12 bolt posi. 2-1/2 inch torque tech exhaust with walker turbo mufflers. also the 2 bolt vs 4 bolt argument, since this is a tow engine, not a high rpm race engine, you should be just fine with 2 bolts. make sure to replace the bolts with high quality bolts, such as ARP, and you should be good to go. 77 K20 350/350/203 - 90 K3500 454/80e/4401 - 94 K1500 350/60e/241. Save. Best heads for sbc 350, When purchasing the assembled heads, you get Manley stainless-steel intake and exhaust valves (with wither 7- or 10-degree retainers), your choice of 1.250-, 1.437- or 1.550-inch valve springs to complement the camshaft design your engine is utilizing, Viton valve seals, hardened spring cups, a Dart two-piece guide plate, and ARP rocker arm ..., The Flotek Cylinder Head is made with high-quality materials. It is assembled with precision. The valve sizes are ideal for small block Chevy engines. The chamber size is also a good fit. The springs are straight and of good quality. 3. Straight Aluminum Bare Cylinder Head Compatible with Chevy Small Block 302 or 327 or 350 or 383 or 400 SBC ..., I used Crower 66282H-16 lifters with standard Jesel SB 2.2 rockers. The push rod lengths ended up being BBC +.100", with heads that were milled ~.070" and a standard deck ht. Dart Little M block. I had the cam custom ground by Cam Motion with a .900" base circle, to aid in connecting rod clearance (4 rods still had to be clearanced)., Best initial timing for mild SBC. I have a GMPP 350/290 hp engine. The 222/222 @.050 cam was mismatched to my driving needs (need better economy), so I have swapped it to a Summit 1101 camp that is 194/204 @.050 . I have static timing at about 11, and total (with centrifugal) at about 30. I also have a vacuum advance that adds about 17 …, Nov 5, 2019 · When the engine gets built, the old iron heads are going to get scrapped, so teflon or viton seals are not required. I removed a couple of valve springs and took some measurements. Here's the stats I measured: Intake: 0.343 (11/32) stem, 0.556 guide. Exhaust: 0.375 (3/8) stem, 0.564 guide. , , Intake runner volume, bowl volume and design, chamber design. The old heads were made for a 327ci engine, not anything bigger. 72 Nova- LS 370 88mm turbo 4 link. 99 Transam-LS 370 76mm turbo. 71 Chevelle slow 350 building a LS 5.3., Head gaskets are essential components of an engine, and when they fail, it can be a costly repair. Knowing the cost of head gasket repairs can help you budget for the repair and ma..., 5 Best Aluminum Heads for Small Block Chevy. No comment (s) 4.3 (86%) 20 vote [s] DNA Motoring CYLH-SBC-350. High Grade Aluminum, Bronze Valve Guides, Hardened …, Jul 6, 2018 · Great GM history lesson, i have several 283, 327, 302 DZ engines and internal block parts Nos GM from a COPO Dealership that closed in NC.im also sitting on 9sets of small block chevy 49cc cylinder heads from Dart Machinery Inc.Bare heads NOS in boxes.I have built several DZ engines for restorations. , Replacing Cylinder Heads for Chevy 350. As durable as it is, Chevy 350 is not a problem-free engine. Among all engine problems, the most common and costly job is …, SBC CHEVY 350 383 406 NKB-200cc ALUMINUM HEADS 68cc STRAIGHT PLUG NKB-272-PBM. Available $849.00. Add to cart. , America's favorite high-performance cast iron small block cylinder heads offer big power and bigger value. Chevrolet Vortec Cylinder Heads' fast burn combustion chamber and high-velocity ports combine to produce big horsepower. Vortec Heads can be mildly ported for additional performance and milled up to .040'' for increased compression ratio. , 1. Aulatben Fits Sbc 350 383 400 Under Header Hei Ultra 40 Spark Plug Wires 73686 A0314a0005. The Aulatben Fits SBC 350 383 400 Under Header HEI Ultra 40 Spark Plug Wires 73686 A0314A0005 is a high-quality ignition wire set designed for use in a variety of vehicles. Before purchasing this product, it is important to check the Amazon …, Promo. Speedmaster®. Chevy SBC 350 Straight Solid Roller CNC Cylinder Head Top End Engine Combo Kit. No Reviews yet. MPN: PCE435.1012 UPC: 840136553571 Extended Warranty Eligible. US $1,620.50 US $2,315.00. You Save US $694.50 (30%)Single Points Earn 1621 Points. Build to Order. Quantity., The PE246 cam from COMP Cams offered a .429/.438 lift split, a 206/212 duration split (at .050) and a 110-degree lobe separation angle. The combination of ported and milled stock heads from L&R ..., With more than 15 inches of vacuum and 175-180-psi cranking compression with either head, this setup is optimal for an entry-level, 10:1, 355ci small-block Chevy. 2. Magnum 280H-10. The second ..., Feb 20, 2017 · 350 Chevy-Stock vs Headers vs Q-Jet The graph shows that a stock two-barrel, 350 Chevy could hardly be considered a power house. The combination of mild cam timing and limited breathing through the two-barrel induction and stock iron heads resulted in peak numbers of just 241 hp and 359 lb-ft of torque. , #1 · Apr 3, 2020. guys, need help spending my stimulus check. 66 chevelle, 3.55 gears m20 4 speed, flat top 350 with a Elgin.420 performer type cam. 750 vacuum secondary holley, …, Summit Racing™ Precision Cast Cylinder Head SUM-162LS210CATH. Chevy LS Cylinder head, 210cc Cathedral port Intake Runner, 64cc Chamber, 2.02 Intake Valve 1.6 Exhaust Valve, 3.898+ bore sizes, Max .600 Lift Ea. Part Number: SUM-162LS210CATH., An easy way to gain 20-40 horsepower on any 1955 and newer Small-Block Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling) is by installing a set of Vortec cylinder heads. These value-priced cast-iron cylinder heads use modified combustion chambers and high-velocity port technology to provide improved performance., SBCglobal email is the product of the merger between AT&T and Yahoo!, giving SBC users access to all parts of yahoo.com. SBCglobal email comes with SBC Internet, which is one of th..., You need springs, valves, retainers, locks and stem seals to finish them out. Shortest distance between these head’s in a box to on an engine is a Competition Products head improvement kit, there’s a bunch to choose from. Aftermarket aluminum heads typically use valve that has .1 inch longer stem as the casting thicknesses are greater …, The Gen-IV small-block Chevy V-8 hit the streets in 2005 as the 6.0-liter LS2 (which eventually evolved into the 6.2-liter LS3), based on the Generation-III but redesigned to utilize displacement ..., Find CHEVROLET 5.7L/350 Chevy small block Gen I Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! , Tho the 487x heads are said to be 1 of the better smog heads,they are still just a large chamber smog head.Designed more for emmissions than power.Large inefficient chambers,small runners & in stock form,can only support approx 350 HP with an ideal setup with matching parts.Having to use domed pistons to make power is the 1st giveaway to …, Salmon is a versatile and delicious fish that can be prepared in numerous ways, including baking. Baking salmon at 350 degrees Fahrenheit is a popular method that ensures a moist a..., BluePrint BP3961CTF GM 396 SBC Dressed Engine, Alum Heads, Roller Cam. Crate Engine Type: Long Block. Engine Displacement: 396 cu. in. Horsepower: 485 horsepower. $8,949.00 /each. Add to Cart. BluePrint Engines | #227BP3961CTC. ... and the best 350 Chevy Small Block Crate Motors online. ..., Installing a Summit Racing dual plane intake manifold on a small block chevy with vortec heads.Intake part number: SUM-226018Gaskets part number: FEL-1255, Product Model RACING STREET/STRIP Engine Displacement (cu.in.) 350 Engine Family CHEVROLET - Small Block V8 Material 2618 Forged Aluminum Base Bore (in) 4.000 + .030 Stroke (in) 3.48 Rod Length (in) 5.7 Compression Height (in) 1.575 Top Type RD dish Top Net Head Volume (cc) -10cc D-cup dish Deck Thickness (in) 0.280 Wrist Pin …, Unacademy has laid off 12% of its workforce, or about 350 roles, in its latest round of layoffs amid the market slowdown. Unacademy has laid off 12% of its workforce, or more than ..., Don’t go out and buy a 1 7/8 inch primary tube header for your street driven 350, which is what is commonly considered overkill. Not only that, it can actually rob your engine of power. Most of our techs agree that a street application 350 will benefit well from a header with 1 1/2” to 1 5/8” diameter primary tubes and 2 1/2 or 3 inch ..., The heads will heat up much faster, and will also be a hotter temp all the time. I measured both locations on my 327, and before my 170 degree T stat opened the head 1/3 location was already at around 190-200 degrees. Once the stat opens it drops, but still read 10-15 degrees higher than the intake manifold location.