Which heads to run on 340

wow ok now we can get some info justin i have a set of 71 3418915 B
now i am in the same boat i dont know if you saw that kit i talked about but it is being produced by pro comp its a take off on the rpm head so i am trying to decide do i go aluim 65cc 2.02 /160 with a 190 runner or have my 2.2 /160 steel heads carved up and go that way can u give me some advice here and mabbee the rest of us can make an easier decision on what is the better bang for the buck i am trying to build a 408 wanna see around 500 hp and need some pro help or stay at 360 + 30 bore and get 450