Hi Im new in this forum, and Im wandering what is involved in doing a motor swap in my 90DX.... Im goin B16. I want to turbo it, so how hard is it gona be to fit everything under the hood? Should I go with the JDM siR 1? or USDM? Any information would be greatly appreciated. Also is there any differance between a b16a1 and a b16a2 block?:dunno: