5.3 with a Borg Warner S475 turbo. Built turbo 350 tranny but have a 4L90e that is getting built to replace it. 3.07 rearend with a Auburn locker. 635 HP 600 ft lbs Tq at the rear wheels. Stock bottom end, Tooley Stage 2 cam and valve springs. Brutal Speed and Tuning in Maiden NC did the engine swap and built the turbo system and tuned it.
https://www.youtube.com/watch?v=Hqs0ZsUCmPs