+1 instead of dropping a 2J , get a 1J Manual Soarer they range from 10k and up. Get dumps ,front pipes and a cat back, with a FCD 15psi boost, FMIC and a fuel controller ie SAFC II or AFC Neo and you'll net 230rwkw. Then you can go for steel wheel turbos and ECU for more power.
Except they are a heavy car weighing 1600kg+, having owned a few SR20 s13's, a Soarer and a 33 GTR. Handling wise the GTR>s13>Soarer.