If I was able to get a set of 302 heads, would it be worth my while in getting them and go with 1.88 intake and 1.600 exhaust valve's along with the other modifications you mentioned or just stay with the stock heads
I'm guessing your not porting say the basic build 9:1 cr xe250h cam 600 cfm performer intake and headers, the heads you pick will effect your final hp output. so any 273/318 stock heads makes 250 hp, 1.88 360 heads might get you 280 hp, magnums heads 300 hp, speedmaster or eddy heads 325+ hp etc... those obviously guesstimation. I'd go with speed master if you have the money, best dollar to performance ratio and it's hard to justify putting money into stock heads.