9" drum to disc conversion confusion

F body (Aspen, Volare) control arms will not fit. They are a very different piece.
You need either the 73-76 A body uppers or a set of ball joint adapters from Doctor Diff so you can use the earlier A body small ball joint uppers. No other stock UCA's will fit from any other MOPAR.

Spindles out only from the F, M, J and late B donor car for the disc brake swap.

Thank you for confirming what I have always read.