Y not VQ35DETT, it would work better, maybe cheaper and u have a large displacement. I talked to u a while ago about single turbochargeing my z but i'm building my twin right now. i think getting a vq and rebuilding it (fully) going twin with it and u should be able to reach your goal alot faster, i thought about doing the same with a RB just to have a inline six skyline motor, that would be bad, not much for leagal but nobody has to know. but good luck with the RB let us know how it goes and when u get it going hope u pull the times u want that shlould be one hell of a ride.