Master Cylinder Selection

[mcmlxix]

I have a 72 K5 Blazer with upgraded disc brakes.

The rear axle is an AAM 14BFF from a 2005 Sierra 2500 with twin piston calipers and 13 inch rotors with built in E-brake. Rear axle total piston surface area is 12.69232 inches (4 pistons total.)
The front axle is a Dana 60 with custom brakes from a 2009 Dodge 3500 with 14 inch rotors at 1.5 inches thick. The front axle total piston surface area is 18.09556 inches (4 pistons total).

I am running a 2005 GM Hydro-boost. The GM master cylinder bore was 1.3125 inches but the donor for the Dodge front brakes had a master cylinder bore of 1.456 inches.

I was looking at the Baer Brakes Remaster master cylinder but its only offered in 1.125 inch bore. Will this work and what can I expect from the difference in MC bore size?


FRONT BRAKES
2009 Dodge Ram 3500 HD
Master Cylinder bore: 1 5/16 ~ 1.3125 inches
Front caliper piston bore: 2.4 inches (2 per caliper)
Front caliper piston surface area: 4.523893421169302 (2 per caliper)
Front axle total piston surface area: 18.09556
Front Rotor Diameter: 14.173 inches

REAR BRAKES
2005 GMC Sierra 2500
Master Cylinder Bore: 1 7/16 ~ 1.456 inches
Rear caliper piston bore: 2.01 inches (2 per caliper)
Rear caliper piston surface area: 3.17308711994203 (2 per caliper)
Rear axle total piston surface area: 12.69232 inches
Rear Rotor Diameter: 13 inches