Master Cylinder size question

[66shortwide]

Any brake experts out there? Wanting to run manual brakes on my truck and have a couple of master cylinder questions. I have c4 corvette brakes front and rear(twin piston front calipers, single piston rear calipers) - so, what size master should i be looking for? 1"? If i go with a two master cylinder set up, should the front and back be the same size or different?

Really leaning toward the 2 master set up with the adjustable balance bar from wilwood on a 180 degree pedal set up so the firewall stays clean.

[bama63]

use the 70-75 corvette master 1" for manual brakes 1 1/8" for power brakes, i used the manual set up and it works great, now i run the wilwood super lites on my dirt racer with a 2 master both in 3/4" with 3/16 line all around and stops on a dime with little pedal effort