brake pedal too high

I ordered the following from rockauto.com for a '73 Duster 340 with power disc to run on my '69 Barracuda with manual disc cause I wanted the 15/16" bore. Direct bolt on. It has a snap ring:

RAYBESTOS Part # MC36406 Professional Grade; Bore Size=15/16" One of our most popular parts Front Disc Brakes; Power Brakes