If it has a sunroof, replace it with lexan.

pull window washer stuff, pull misc nuts and bolts out of the interior. Pull passenger seat and seat belt. pull passenger mirror. I think the 88-89 doors are lighter, I know the hatch ones are. If it has rear disks the drums are lighter.

Start replacing parts with lighter ones. Battery, rotors, wheels, calipers, rear hatch, seat, control arms, hood, door glass.