definatly need to get a 255 fuel pump and probably a lil biger injectors around 450cc dsm's work great i wouldnt go with vafc but thats your own choice i would just get the ecu chiped and tuned mainstream performance does this and are verry good at it i ran 6.5 psi from a garrett m11 on a stock ls and got 199 on the dyno soo 200 is easy get a good turbo dont go cheap and be prepared to do more cause your gona get hungury for more boost allsoo make sure you get it TUNED on a dyno