Hello all! My dad and I have '69 dart. It has manual brakes. 73 Dart discs up front and always had a great pedal. We got a summit rear disc brake conversion, single piston calipers w/ built in parking brake. Since the swap the pedal needed two pumps to get a good firm pedal. fluid shoots out, no air. Blead it, used a pressure bleeder ect. It got better when I tensioned the e/brake cable a bit. It is not dragging or anything. The master cylinder is a drum rear, disc front m/c from a 73 dart. After all my goofing around the pedal finally gets firm on one pump, but i'm still not satisifed with it. I was thinking of a 2 lb res. valve for the rear. Also I do have the bleeder mounted upright. Thank you so much! Happy holidays.