Thank You
@CFD244 !!!
I double checked the bolt head size and they are in fact different. 13/16 on the donors and 3/4 on the car.
Rather than machining the holes larger, I will replace the ball joints with new correct ones for a '66 with KH Disc's. The donors look beefier than what is on the car. Don't want to worry if I weakened it and have a failure.
