Front/rear balance after front disc swap

I think you won't like the braking performance with a 1-1/8" MC.
I've got 2.75" calipers, 11.75" C-body rotors, Yellowstuff brake pads and a DrDiff 1-1/16" MC on my '73 Dart.
10" x 2.5" rear drums on a narrowed C-body axle.
While brake performance is good and very adequate for daily use, it still won't 'put you through the windshield' when braking so to speak.

I'm sure a 15/16" MC will provide enough hydraulic pressure to accomplish that.