Hughes sells slum and cast iron. I would never go cast iron on boost unless I was really making massive power and there was no other choice. Edelbrock makes the only aluminum head im aware of, and it's a damn good one.

 

Cam selection is based solely on what you want out of your truck and what mode you've done. For a mild boost build, look at the KRC 210B cam.

 

Hughes would probably be able to get you a set of Mopar Performance RT alum heads as well.
Without them buying in volume probably be fair bit more expensive than the Eddys.
Mopar Performance sells them in either bare or loaded with 202/162 valves IIRC & 600L springs.
They arent as good as the Eddys.

Does KRC/WPE even sell the 210B anymore?
Few cams off the old KRC list of 318/360/390/408 cams not even listed anymore.
Cant remember specs on that cam aim4 mentions but either way with turbo you want lsa in the 116-118 range & very low overlap if not negative overlap (as in none)
If you go high lift & duro then you better have the tb, intake, tc, fuel to back it up

 

Levi owns most of the stuff Marty did, so I'm sure the 210b cam is still on file at comp cams.

Didn't know you could still get the MP R/T heads in any flavor anymore, but I agree that the eedys look to be of superior build.

Indy's spot on about boost. Its a whole different beast, and you'll need to invest in a good tuner and book some time with a dyno and datalogger to get that dialed in. Seems as though no 2 boost builds are ever quite the same.