1969 disc and drum lower ball joints

[ir3333]

I have read that '69 disc brake lower ball joint on A bodies is the same as drum brake lower ball joint but uses 9/16" bolts instead of 1/2"
..has anyone just drilled the drum brake ball joints to 9/16 or is the disc unit cast a little thicker in this area for the larger bolt hole?

 

[Oklacarcollecto]

I have read that '69 disc brake lower ball joint on A bodies is the same as drum brake lower ball joint but uses 9/16" bolts instead of 1/2"
..has anyone just drilled the drum brake ball joints to 9/16 or is the disc unit cast a little thicker in this area for the larger bolt hole?

Same casting. Drill the ball joints out to 9/16" and they work just fine.

 

[ir3333]

tx OCC
..nice that they can be re-used on my 4 piston disc conversion

 

[Oklacarcollecto]

tx OCC
..nice that they can be re-used on my 4 piston disc conversion

Glad to help. I had that same issue because I had already purchased drum ball joints when I found my disc brake set up.