I'm baaack!

First off this is a USA spec car- 69 Auto Petrol-Sedan. So it has power assist(standard brake booster) front discs(with the twin piston 48mm calipers). 255mm rear drums.


Originally it had a 19mm bore master cylinder (USA, Norway, and Sweden Spec for some reason..). Looking towards replacing it with a 504 type, and shorting the rod.. At the moment it has 22mm rear cylinders. The car has been really fiddled with everywhere, a lot of the parts are just simply not right.

Anyway what kind of rear cylinder do you guys run? I'm thinking of just going with a rear drum style from a 504. Am I wrong thinking this?