Starting my Early-A Conversion to disc

CFD244 said
The K/H disk set up use lower balljoints with a 9/16 bolt. Drums will have 1/2. New ball joints or drill/machine for larger bolts.

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.