Krylon's recommendation for a Cardone 1329 is a good dual bowl cylinder with bore sizes very close to stock Ford's 1 -1/16". It also has good port sizes that can be used and adapted to 1/4" brake lines.
Bore Diameter: 1" (25.4 mm)
Master Cylinder Primary Port Size: 9/16 x 18
Master Cylinder Secondary Port Size: 1/2 x 20 more details on -
https://www.carid.com/cardone/brake-...n-13-1329.html
I currently have a stepped bore master in my 32. The stepped bore was designed for moving a large volume of fluid quickly to take up the gap in early Chevy applications that used front disks that were low drag. These are the bore sizes on my CARDONE 101905. Note that there are no residual check valves inside this MS so those shall be added into your system.
Bore Diameter (N) 0.945"
Bore Diameter (N-1) 1.25"
For the front brakes, primary side, the initial lower pressure fluid is pushed with the N-1 large bore of 1.25". This closes the gap between front shoes and brake drum, then the N bore of 0.945" applies high pressure to both the front and rear brake drums. The advantage is that the initial 1/4" stroke takes up the gap and then the smaller N bore takes over. The pedal stay6s high without a lot of pedal travel. I'm very happy with this setup but I also believe that Krylon's MS is a great choice too.