#8 heads...what to do?
#2
The valve sizes of the #8 heads (1.875/1.622) will not make getting 300 hp a challenge. The 79 cc combustion chamber size, on the other hand, will. What do the tops of your pistons look like? If they're not flat (if they're factory pistons, I'm sure they're dished to one extent or another), you've got a fair bit of milling to do. Afterwards, you'll need to shorten the pushrods or install a shim kit because of the Olds non-adjustable valvetrain - I'll admit that I'm not 100% sure of what I'm talking about here, so get some more opinions/advice. You'd be better off to find a set of #5, #6 or #7 heads - these all have 64 cc chambers. These heads all provided at least 9.0:1 compression in their day (the pistons they were used with might have had shallower dishes than your late 70s 350). Just my 2 cents; most others here will know better than me!
- GoldOlds
- GoldOlds
Thread
Thread Starter
Forum
Replies
Last Post
64 CUTLASS KEN
Big Blocks
44
December 7th, 2020 06:43 AM