What master cylinder should I use

[resin addict]

As explained before, I took over somebody elses project (32 Ford), he had a master cylinder already bolted to the frame, I'm going with finned Buick drums in front and stock Ford drums on the rear. The master cylinder he had mounted has a larger compartment fot the front brakes than for the rear, which accoring to what I've read is for a disc/drum combination.
What master cylinder should I be using for a '32 Ford with a drum/drum combination?

[Henry Rifle]

Assuming that the MC is under the floor, it should work - assuming you install a 10# residual pressure valve in both the front and rear lines and a proportioning valve in the rear line.

[resin addict]

I knew about the residual pressure valves, but not the proportioning valve...although now that I think about it it makes sense.
Thanks.

[Henry Rifle]

Since the MC wasn't designed for that particular car/weight/weight distribution/tire size, etc., I think the PV is a good idea.

[Bob Parmenter]

You may want to check and see if the m/c already has check valves internally. They'll be behind the inverted flare seats in the ports. The other thing to look at is piston diameter. Some m/c housings have that indicated on the outside of the m/c housing, e.g. 1 or 1 1/8". The larger the bore, the more pedal pressure you have to exert to activate the brakes. For drum/drum something like a 7/8" would be easier on the leg. Typically if the m/c was intended for power brakes it will have the larger bore.