junkyardhero said

1st i would talk to the machine shop, the overbore will dictate which pistons you can use-- it *should* be fine, in that most everything comes in 20 & 30 over it's just the price that might be a surprise (some are like 100bux more). also, they'll need to know what to finish the cylinder at for piston clearance and rings. unless they're assembling the bottom end, that is.

anyway, KB107's are a popular choice. speed pro H405CP and H116CP, as well as KB190 are all good too, it just depends on the application.

there's a lot of factors at play here and getting the compression you want while working within the parameters of parts you have is going to require a little homework. figure out the cc of your heads and then work from there factoring in the headgasket thickness. you're working on the assumption of a stock deck height (which can vary), and that's why a lot of people zero deck on a build.

i've used KB107's in a 360 with 72cc chamber heads and MP headgaskets and gotten 8.8:1 on a block that wasn't decked. that's probably the exception, not the rule though. and i was lucky.

on a cam, i'd keep it mellow with just your basic 3/4 race unit.

kidding, kidding, but i'd totally do something "RV adjacent" that's dual pattern, around 450 lift and 220 or less duration on a less than 114 center. i like the howards street force 2 (or street force 1), crower compu-pro 3 is interestesting, budget melling always gets a nod, everybody seems to like the comp 262 piece, if you're down with comp stuff.

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