you could first do the fundamentals....downpipe...exhaust...and intake...those right there will give you gains that will satisfy you for some time...i haven't heard much about the GReddy turbo...cause i'm new at this too...i'm tryin to get my 7M-GTE to start...haha...if you do infact get a supra...make sure it comes with a LSD...cause that's pretty crucial to drag and auto-x....if you plan to attend the events....i'm lookin into doing NOS too...but that sounds crazy....i actually just got my GTE...it was given to me by a family friend....check out my post...its' like right after yours....