I`ve put together a mix of vehicles and drivetrains. The body is a 1951 Ford Coupe. Floor, frame, suspension is all 1983 Cutlass. Engine is 430 Cu In Buick. Trans is also Buick: the switch pitch model TH400. The Ford body limits the size of wheels and tires. The Olds rear is the 7.5. I`m planning to install a 8.5 posi track.