What I found interesting.
Is they list power brakes master as 15/16 bore.
manual brakes ( same application ) has 1-1/16 bore
I believe some of the PB cars had an additional bell crank linkage that may have changed the pedal ratio not sure which direction though
The 69 B bodies I owned, and my fathers 72 duster, with power discs all had this , B body under the dash , A body under the hood . I believe it was because they had to raise the assembly up so the booster would clear the engine/exhaust manifold ...
