I'm in the same dilemma. I have a 67 Dart GT. Will be putting in a 400/ 727 next year. Installed an 8 3/4 already and plan to go with 10 x 2 1/2" Rear Brakes once I order Dr Diff Axles. I have all the front end braking stuff, 10.95" Rotors, Single Piston Calipers, etc with 75 Scamp Spindles &...