....while sharing experiences I can say that my booster/m.c./pedal & brackets bolted up just great on my 52 Panel. I got mine from PirateJack in Asheville,N.C. and it all worked very good. I did enlarge the top of the hole for the brake pedal but feel that was some error on my part replacing all the floorboards & and a little problem with crossmember was not PirateJacks fault. All their parts fit like peas in a pod!
...and more than a $100 less than the "usual" vendors we use.
Just my "experience".