4.6 bore 5 '' stroke. 121 cc head I thought it was 10.5 to one, I've seen a 598 flat top crate that claimed 10.88 to one, but the didn't say what head they were using.
i dont really have budget to basically start over so i want to do either top end or bottom end. so i guess a better question is , how would a large intake runner head perform on a 10 .5 to one
Second question would I be better off putting a good set of nos 14 to one pistons to race this season and head intake carb next.
lol just another racer that wants to go faster than he can afford
gotta spend what i have cause it tends to go some where else if you don't or may be buy the parts and set them a side.