I found two problems in mounting the booster master so far. As expected, can't mount it as far forward as designed because of the 700R4 transmission. This was expected.
Unexpected - '46 and earlier had the master mounted ahead of the peddle and the pushrod attached to the peddle above the shaft. push the peddle down and the pushrod moves toward the front of the truck. On the '48-'53? the peddle has the master behind the peddle, facing to the rear and the pushrod attaches below the shaft. This causes the rod to move to the rear when the peddle goes down. Solution 1 drill a hole in the peddle casting the propper distance above the shaft and put a 46 and earlier rod attaching bracket on. I'm looking at solution 2 (because I have to change the location anyway) to mount the booster/master assembly in reverse so the pushrod direction is the same as original.