im doin the same... bought a s13 with rb20det.. so far its got 1 bar boost (std turbo) reco lsd, big fuel pump and reg, 3inch zoorst, clutch and boost controller.. im hoping to get into the 12s.. im thinking get a vl t3 cause they bolt on and just get that high flowed using t04 internals maybe different compressor housing?? also fmic, cam gears and then maybe computer.. if i can get tractioni mite get lucky... the guy im buying it off thinks that with traction a 12 would be possible as is!!! not too sure about that.. guess ill find out when i get it! probably best geting r33 gtst gear box as well.