lunati 408 kit, replacing rings with total seal, worked(not too much)heads with isky springs, not sure on cam but will be a baby one maybe something like the ZO-6 cam, no headers(yet, no more money), ATI charger, will probably push about 8#'s, turn to about 6k, 9:1, intercooled.

 

i am going to toss out a guess but remember i haven't even had my truck on a dyno so what do i know.

with a super mild cam like that i would say 375+rwhp just for the 408, then add 125+ for the blower. so puting you at 500-550rwhp would be my guess. of course you have to get headers, you can't spend 5-8k on an engine and another bunch on blower and not get headers.