I rebuilt the TRW pump in my 1965 Dart 273. My 1965 Newport 383 also uses one, but differs. Both have 2 bolts on the rear, so strange that your reservoir only has 1 hole, yet the long channel of the TRW pump. For those that don't know, the TRW pump was used on early Mopars. The Federal (sometimes called "Chrysler") pump looks almost identical from the outside, but varies quite a bit. My 1969 Dart 225 had one. My 1965 Dart does too because I made the mistake of changing to the later aluminum water pump (to match new radiator) and it can't mount the TRW brackets and brackets exist only for the Federal and Saginaw pumps (I bought at Bouchillon). Since the Dart TRW pump was rebuilt and painted purty, I tried to use it on my Newport when I removed its pump for other things (camshaft swap, ...). But, I needed the pulley on the Newport's pump and turned out its TRW pump has a bigger shaft so nogo. That explains why the rebuild kit comes with 2 sizes of needle bearings and lip seals.
Smart idea using nylon ties to press in the rotor shoes. I wrapped a wire tight (as recommended) and it was a fuss. I spent much time searching for photos to determine which way the shoes should go. I should have taken more photos on disassembly. I don't recall much trouble removing the front seal and needle bearing. I forget if it had the C-clip, but likely did. If choosing any p.s. pump, people say the Saginaw is more efficient. Rich Ehringberg has an article on adjusting the relief pressure of the Saginaw for more steering feel. But, not all engines have brackets for every pump, some will interfere with the K-frame, pulleys might not align, and the hose fittings vary between TRW, Federal, and Saginaw pumps, and also between steering gear valve bodies.
