70 Disc vs 73 disc

Abodybomber said
IIRC,there is a difference between lower ball joint shaft diameters & taper. Did this swap 20 years ago,on my 67 notch Cuda. I got lucky,and found a set of shims locally,to make the difference. If I am not mistaken,Dr. Diff was selling them now. Or swap ,to the 73 lower control arm. Either way,73 calipers are so much cheaper,than the Kelsey Hayes 4 piston stuff.

The lower ball joint may be different but the lower control arms are the same unless you have sway bar brackets. The 73+ upper control arms had the bigger ball joint that match the 73+ spindle. IMO the swap to the 73+ brakes and ball joints is good swap from a cost of parts perspective. You have to use the larger bolt pattern wheels though.