The original poster listed what he had to work with. On top of that he probably has tight budget. Why do members automatically start calling for aftermarket heads, forged pistons, roller cams ect. He has some template ported iron heads. If they are good to go and dont need $$$$$$ they are fine! (Great actually) I hope the original posters goal is realistic- what he is doing is like a stock muscle car kicked up slightly. Super drivable with no fussiness and runs 13s in the 1/4. An honest 375-400hp..ish?