Quote: Did you confirm the master cylinder and caliper bore sizes?
If you installed '76 and newer slider calipers (2.75" bore), coupled with a '73-'75 A-body POWER (15/16" bore) master cylinder, you will experience long, light pedal travel.
The master I'm working off the part number that was ordered for my '74 Duster with disc brakes, same for the calipers.
The master is *suppose* to be 1 1/32" and worked fine with the drum brakes. It takes a stout leg to operate a power master cylinder without a booster but I'm use to a clutch pedal with big spring rates so not a big deal to me.
The pedal feels solid, not light at all just spongy. Almost like the pedal linkage is flexing but that has already been eliminated by turning the line lock on.
I'll take some measurements tonight if you like, have to check the casting for numbers though since the master is secured from the inside.
