Started on that but got distracted by the bent spindle.
Yes the calipers are reman.
3 problems to deal with. I have an unusual issue that most of you won't have; 700R4 transmission. It is twice as wide as the stock 4 speed and has a cross member added for the rear trans mount. That creates issues with placement. Second The 48 has dual exhaust. 2" pipes side by side at about the original height. Third, Randy's '46 has the rod for the master mounted above the peddle shaft. It pushed forward into the master. That is why he built that great mount assembly that has the master facing forward (like original) and the bell crank behind.
'47 on had the original master mounted behind the peddle and the linkage below the shaft pushing to the rear.
The 11" booster was giving me a lot of trouble finding a place it would fit. Had to be behind the cross member, touching the exhaust etc. I ordered an 8" dual diaphragm to see how it works. I might even be able to fit a 9" dual.
To use Randy's mount it will have to be flipped over and mounted backwards for the push rod direction to be correct, or drill a hole in the peddle the correct distance above the shaft to mimic the 46 setup.
Still in the thinking stage until the booster gets here.