i'm building a 408 so i wanna upgrade my t56 to handle the est 500-550whp thats gonna be thrown at it, what parts should i upgrade? theres a shop on ls1tech that has a stage 3 upgrade for 1400 that would make it bulletproof if i put a s/c on top of this setup later and that includes labor for them doing it, from looking around rebuild kits for doing it my self is almost 900 maybe i'm looking in the wrong places but it doesn't make much sense if i'm gonna do it my self and it would only cost me 500 more for someone else to do it then i'd prolly have someone else do it.

i'm taking a trans rebuild class so i was gonna do it in there