Actually, an engine swap might be a good idea. An old mate of mine used to run a NA Sierra Cosworth engine in his 3 door mk2 1.3 (L I think); he upped the compression and carbed it with twin 48's. Fitted and LSD and single piece prop too. Lowered all round, RS wheels, quick rack, Mexico front and rear spoilers. Nice mechanicals but the body was starting to get bad. Swapped it in the end for an XR4i because he couldn't be arsed to fix all the tin worm.