Quote Originally Posted by 2manymustangs View Post
with 73.5 cc combustion chambers and assuming a .045 thick head gasket and very minimal valve reliefs (flat tops with valve reliefs were stock on CJs). some of the later CJs had the piston down in the hole by a fair amount to drop the compression but my 1970 block/parts end up with nearly zero deck clearance. I think the actual CR is down closer to 11:1...

When you throw the small chamber CJ heads on a 460 you instantly go WAY up over 13:1, that is why all of the big stroker ford pistons are dished (inverted dome)...
I guess the question still stands- hows it gonna run? and whats it going to do in your boat?

So you got a non pump gas friendly mill.

Once you commit to race gas you can't just drop onto any ole place and fill up so that pretty much defines the boats role.

If you are going to run race gas then you can run 13:1 and over.

Love race gas toys. Id like to have one as a third boat someday.

UD