Not an expert but the different pumps, Federal, TRW//Thompson, Saginaw should all work with the PS box as far as I know. With the proper bracket on the engine it should line up OK with the other pulleys, provided they too are correct for the engine. Pumps with pressed on pulleys can have the pulleys adjusted slightly on the shaft although to press the pulley on the shaft further would require disassembly of the pump. A pulley puller can pull it out slightly if set too deep. Early pumps/boxes (through 1966) use a 5/8” return hose. Pumps and boxes after that used a small hose (1/2”?). This has to be coordinated although the return valve/hose nipple on the box is a separate piece and may be interchangeable - not sure on that. Also, there are 3 different angle return valve/hose nipples available - 0 degrees, 45 degrees, and 90 degrees. Not sure which goes with what but my 440 GTX has a 45 degree one and my 66 Hemi has a 90 degree one to clear the exhaust manifold.
About all I know, or think I know.
