hmm on a 89 hatchy... take everything out of the interior -jack...spare tire... back seats.. passenger seat... LIKE HE SAID^ carbon fiber anything possible... u can carbon fiber your rear hatch...but dont get fiberglass its to sensitive will break easy... unless u really want it.. not worth it though... do a swap.. get rid of ur ac pump and ur smogging stuff... all i can think of off the top of my head... good luck