ok 1st off i would go with vortec heads, cus they flow really good without porting, i would also look at some new valve springs with a lil more seat pressure, and a comp flat tappet, only because u can call comp and theyl tell u witch cam will give u the most power, only catch is that with vortecs if u run bigger than a 480 lift cam u have to mill the spring pockets, if u do that it will give u about a 530 max lift, different springs will also allow for more lift flat tops would be good,and arp rod bolts are must if ur makin anykind of reall power, i would also go with arp head and main bolts or studs,
hope this helps