Engine is one thing, Then there is lots of other major things, I had a hard enough time building a nice street car sorted with 300+ odd KW.
Far out i dont think il even bother putting my car on the track, Until its really sorted i wouldn't trust it, and i dont have the wallet for shit to go pop!
I think racing is more time in the seat then anything, I'm sure we all thick were schumacher until we hit the track and realise your 100k GTR build is getting ripped by stock GTs-t with mild suspension work
I didnet really answer your question did i? what im tryign to get as it, If you don't want to spend $10k you probably shouldn't spend anything
Try look around for one that is already done, Buy at someones loss.