a 6th gen j30 can go into a 5th gen v6 engine bay. ive seen it done before. i dont think the j32 would be much of a stretch

as for 5th gen v6 mods: an aem cai will fit with slight mods, greddy makes a cat back, wings west makes a body/lip kit, eibach and neuspeed make springs

ive seen a 5th gen v6 with bolt ons and a dry nitrous exp. system do low 14s in the 1320. it feels way faster off the line than my 96 ex i4 auto, but i can usually beat my friends 96 ex v6 on the highway. the V6 is VERY smooth though.....