On my 70 cuda, I have a 15/16 master, 2.6" front calipers on 11" rotors, 7/8" rear wheel cylinders with 11x2.5 drums. I am just about to start driving it in the next two weeks after a long overhaul, so I can provide feedback soon. The pedal feels pretty good just from bleeding and stationary pushes.

I was concerned that using a 15/16 master plus 2.75" calipers would produce too long of a pedal travel - based on my research it's a mixed bag, some people say it's fine, others have had issues. Rear drum adjustment plays a big part of the pedal travel. On paper, the 15/16 master + 2.6" calipers was a better combination than the 1.032 master + 2.75" calipers using the same input force.

For the valve, I kept the drum/drum distribution block and added an adjustable wilwood proportioning valve going to the rear brakes.