What percentage of parts from a 4door Mav. would be compatible with a coupe, everything from engine/transmission, supension, interior, to body panels and doors?
The drivetrain will swap right over. The driveshaft might be a bit different. The whole front clip will swap over. Not sure on the doors though. Glass will swap. Rear bumper,valance, tail panel.... The front seat, dash and kick panels will. Not sure on the rear interior.
All suspensoin/drivtrain will swap over with the exceptoin of the drive shaft.(too long) All front clip sheet metal (Hood/fenders/ bumper etc...) Windshield/trim Instrument panel/steering column... Front seat will too but, seat backs dont fold forward. Rear tail lights/bumper (valence if 73 or older) Many interrior pieces like door handels/window cranks etc...