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#1
05-04-2025, 08:38 PM
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Small Block Chevy Header to head bolts
Looking for recommendation on header to head securing bolts. I've always used the same 7/16 hex head bolts with a small flange. Curious if there are better alternatives. Thanks!
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Steve Shauger The Supercar Registry www.yenko.net Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website: www.vintagecertification.com 
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#2
05-04-2025, 09:27 PM
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ARP reduced head bolts that use a 3/8” wrench are just amazing and will make you hate those ancient 7/16” header bolts! They come in SS or black oxide.
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1962 Biscayne O-21669 MKIV/M-22 1962 Bel Air Sport Coupe 409/1,000
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#3
05-04-2025, 10:36 PM
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Is there a market for those old 7/16 header bolts?
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69 SS 350 convertible (in peices) 69 327 convertible (driver)
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| The Following 2 Users Say Thank You to KevinW For This Useful Post: | ||
PeteLeathersac (05-05-2025), Steve Shauger (05-05-2025) | ||
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#4
05-05-2025, 12:31 AM
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I have a couple small cans of header bolts around here. I did prefer the 3/8" hex bolts. They are different lengths too and the longer ones held the torque set better, but they ALL need re-tightening 3-4 times after heat cycles. No memory if they came with header sets, or I bought them aftermarket.
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Mitch 1970 Chevelle SS 1966 Chevelle SS 1967 Camaro ss/rs 1938 Business coupe, street rod 2000 FXSTS, original owner, 13k miles
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Steve Shauger (05-05-2025) | ||
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#5
05-05-2025, 12:51 AM
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Drill the heads for safety wire so they don't loosen.
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| The Following 2 Users Say Thank You to 1967Z28 For This Useful Post: | ||
dykstra (05-05-2025), Steve Shauger (05-05-2025) | ||
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#6
05-05-2025, 01:43 AM
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I use ARP stainless steel bolts with 3/8 head. There are also socket head bolts that work better in some applications.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed
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dykstra (05-05-2025) | ||
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#7
05-05-2025, 04:17 AM
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I use Allen headed bolts. Been using them for years with no problems....Joe
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1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968 pnt OO 1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969 pnt 76E 1970 'cuda Moulin Rouge, 440-6, 4 speed
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69M22Z (05-05-2025) | ||
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#9
05-06-2025, 01:37 PM
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Quote:
Once I tighten them, they do not come loose. And I use Remflex gaskets. I've never had a leak.
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Thomas Schilf '69 Camaro SS, L78, M22, 4.10 Posi '69 Camaro E/SA '00 Camaro SS Convertible '04 Harley FXST '80 Chevy Blazer (My first new vehicle)
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#10
05-06-2025, 01:41 PM
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Quote:
__________________
Steve Shauger The Supercar Registry www.yenko.net Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website: www.vintagecertification.com
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