302 head ?s

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Mar 31, 2005 | 02:08 PM

smoke n tires

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From: midwest

302 head ?s

i have a 78 302 and i recently came across some 68 302 heads. other then the rockers and studs are they a bolt on deal or are the accessory bolt holes different? i want them for the compression. i believe it raises a flat top piston 302 to 10.5-11 to 1. mine has stock flat tops with the big chamber heads and its around 8.5 to 1. any info is appreciated........

Apr 1, 2005 | 10:18 AM

ronclark

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From: Fleming Ga

When I put a 69 302 in my 85 truck to use as a test mule the accessary bolt holes were different. They were spaced closer together and the power steering AC bracket wouldn't bolt up.

Apr 2, 2005 | 11:41 PM

baddad457

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From: south louisiana

I've never seen small block heads that had differently spaced accessory bolt holes. There were however different size threads though. Early heads had 3/8" holes, the later ones were 7/16"

Apr 4, 2005 | 12:00 PM

ronclark

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From: Fleming Ga

Quote:

Originally Posted by baddad457

I've never seen small block heads that had differently spaced accessory bolt holes. There were however different size threads though. Early heads had 3/8" holes, the later ones were 7/16"

I'm sitting here today with 5 stitches in my arm where I let a die grinder slip last week when trying to elongate the bolt holes in a power steering bracket from an 86 302 because it wouldn't bolt up to the 69 heads. The accessory bolt holes were about 1/8 in closer together on the 69 heads.