Technical manual disc/drum master cylinder selection?

I have a '32 ford pick up here with a chevelle rear end with drum brakes and a speedway disc brake drop axle front end, but it doesn't have a master cylinder on it. Interested in seeing where you would start with bore size for a manual two pot master.

Thanks in advance.

 

I have a 7/8 bore mater cylinder on my disc, drum setup... With the right pedal ratio it works very well.

 

Corvette manual disc drum 7/8ths bore

 

I have a Camaro 12 bolt drums and 12” disc up front and I bought a new 1 1/8” bore set up for “Effie” my 1948 F1.

 

This has been a go to for manual disk/ drum brakes for decades.

 

My 32 has wildwood front calipers and 9 inch rear drums ,I have the 1 inch corvette master .If you have single puck big piston calipers the 1-1/8 works better. Also you want around a 6:1 pedal ratio for manual brake

 

7/8" disc-drum MC from a 1980 Mustang.
I have Wilwood front discs & 11" rear drums from a 1979 Ford F-150.

 

Thanks so far. I have a wilwood 7/8 laying on the bench. Guess I need to crawl under the dash and figure the pedal ratio.

 

7/8” Wilwood and prop valve was my choice.

 

See what bore master the chevelle had, then try and do the same for the front calipers, it might just point you in the correct direction of a common size for the two.

 

That’s what I have. A single big piston caliper .