300ZX TT: Quarter mile is 14 seconds flat
300ZX NA: Quarter mile is 15 seconds flat
I recommend that you do not go for getting an NA and buying a TT engine...just by the TT...the swap will end up costing you about $7K on top of your base car so just save the money and buy the TT.
I'd take a ZX TT over a VR4 anyday...it's faster, lighter, more reliable, handles just as good...if not better...dont let the AWD fool you...w/a heavy car w/turbo and AWD lag...she doesnt get off the line or cut S-curves like a scalpel.