Power Disc Brake Master Cylinder to Manuel setup

A 74 A-body power brake MC is the go-to part for manual disc brakes so you're good there.

All you need is a stock manual brake push rod. The Dr Diff adjustable one is good but I got mine from Mancini Racing. It's patterned from the old Direct Connection part.

One more thing, you MUST make sure the push rid is retained in the the MC bore using the rubber retainer sleeve.