Mopar disk/disk master cylinders that will fit and work on his power brake booster
Provide a link, the OP has an issue, you say there is a correct fix for it, but will not help out with a link. Why?
In 74 IIRC the Chrysler imperial used rear disc brakes which should have been a bolt on including the master cylinder.. Probably take someone willing to look through the books rather than the normal parts jockey that needs to know if you have A/C to find you a brake light bulb..
