With the broad aftermarket support for the Mustang and a bottomless wallet, you could turn a basic '65 notchback into a rocket that can also turn and stop...as long as you brace the hell out of the flexistructure and throw away every single braking/drivetrain/suspension component and start all over again. My John Deere lawn tractor is more technically sophisticated than the Mustang's '60 Falcon progenitor.