aluminium head questions

You guys make some good points about keeping the iron heads and possibly adding nitrous. I agree that I can reach the same goals and save money going that route.

I've made up my mind on going w/ AL heads though... I like the increased flow, lighter weight, hopefully better sealing valve covers and dry header bolts. I also feel like the heads will help it take advantage of a bigger cam (hence the switch to the roller).

I really like the looks of the 6 pack setup though. If I'm only leaving 10 -15 hp's on the table it's probably not worth it to me to switch. I'll probably leave it on initially w/ the new heads and cam and see how it runs before I try a 4 barrel.

Any thoughts on the cam selection?