Donor for 63 dart GT

We would need to know the exact drivetrain that is in each car to give you further details.....especially if you're trying to mix and match components. If the '75 has drum brakes, it will have the same bolt pattern wheels as a stock '63. If it's got disc brakes, it will have the big bolt pattern front and rear, so, a wheel change in needed too. With any luck, it has disc brakes and an 8 1/4 rear which would be a recommended upgrade. I just got thinking...and there is another caveat to swapping the drum brakes from the '75. The stock '63 13" wheels will probably have clearance issues with the 10" finned front drums. Test try them first before you do the swap so you'll know what you're getting into.