Universal brake booster 65 Cuda?

A point of interest on the 7 1/2" '67-'72 booster:
Midland-Ross supplied the same booster to Ford- the housings are slightly different to accommodate the Ford master cylinder and firewall mounting; but the guts, and therefore the rebuild parts, are the same. So you can get kits for them from many of the Ford and Mustang restoration parts sources.