If money is not an issue then do it right and do it once. For drifting and being you are in the upper rpm’s a lot I would start with a Dart block. Then call Ed Curtis and have him recommend a rotating assembly, heads, cam, and intake. Then order a MSPNP to control it all and realize it’s going to destroy the T5 that’s in the car. Ge a TKX and a good clutch (Ram, McLeod, Spec, etc.).