15/16" MC with 2.75" calipers any problems with stopping ?

I'll be the odd man here and say that with my wildwood forged dynalites (front disc) and smaller bore rear drum I was running a 15/16" MC for a few years. I do have power brakes, so not manual like the OP. Anyway, I never liked the stopping power because the pedal almost went all the way to the floor. This was fully bled, everything working fine. I switched to a 1-1/8" MC and everything is right now. Not too much travel, since I have power assist, the pedal is not too firm.

With that said - isn't the 15/16" MC designated for the manual brake setup? In the end, if you try one and it doesn't feel right, it doesn't cost much to try the other size and see which works best for your setup.