What master cylinder?

I would like to go to a newer style master cylinder with the screw on caps, the brakes are manual. I am running discs in the front and drums in the rear. I will be switching to rear discs soon. Does anybody know what MC will work with this setup and what model/year to give the parts store?

mancicni sells um,there made by strange and have the proportion already built in em 70%front 30%rear.

Strange.