Super nice 66 Valiant for sale....

cosgig said
It wouldn’t matter if the brakes were from a 70-72 as long as they were K-H. The 4 piston setup doesn’t need near the reservoir space like the single piston design.

Not talking about single piston 73- brakes.
I'm talking 70-72 Kelsey Hayes brakes.
If they took the brakes off a 70-72 for this car, than they installed an incorrect MC. That would be a drum brake mc for 70-72.
Drum brake master.
Disc brake master.
1970-1972
Pretty simple.