why not just buy a coupe to begin with, the vert is the heaviest out of the 3 s13's because everything is reinforced, your better off selling the vert and buying a actual running hatch or coupe if you care so much about weight,

plus the only interior that will fit out of a coupe/hatch is the seats/dash/center console/ and steering wheel and glove box lol

just trying to help you out