I say turbo it, or at least find a D15B7 for $50 and then turbo it. We did a B7 with a little T25 (off a 300z tt) and it made 175whp and 180 ft-lbs. This is about 25whp more then a GSR swap and 65ft-lb more and he spent less money then doing a B swap. Also, if it blows up then just get another B7. Just remember to get a SMALL turbo, something like off a SR20 or Eclipse will work good on a D15. Later.