Kevin
The typical Ford pump from this era has both the square threaded boss on the side of the housing and a threaded hole in the back plate. Apparently, some used the square boss hole for the adjusting bracket and some used a typical sliding hole bracket (like an alternator) through the back plate hole. Which does yours use and can you read a casting number off the back plate? Also, does it have a bolted on elbow on the back plate or just a straight nipple to connect to the hose?