Just an update- Swapped the calipers and pads over last night and bled the system out. Drove the car for about 1/2 hour and worked on bedding the pads in. As expected there is more pedal drop than before due to the larger pistons (2.75" vs 2.60") but the brakes seem to work better. I'm going to drive the car this weekend for a few hours and see where everything settles out. I think the current master is going to stay as with the current caliper and pad setup the pedal drop to pressure ratio if you will seems good to me.

Next step is to move to the rears and get them where they belong with 11 x 2.5" brakes again. Already have two brands of shoes on the way along with new wheel cylinders from e-berg.

Thanks to everyone who chimed in! The car is much more fun to drive with some proper brakes and not diving about.