Stop in for a cup of coffee

My ears perk up when I hear of early A guy's doing the master cylinder because I need to make a plan how to get rid of the single pot dinosaur
I swapped mine out, for a 73-76 A body one, using 71 B body calipers and an adjustable prop valve. Pretty easy. The only thing is I had to pull the pedals and tack in studs. On the Polara, the master cylinder has the studs sweged to it instead of from the inside