{Chrysler 300} 64 K PS pump mounting questions

My PS pump saga continues. I have abandoned the Saginaw upgrade scheme as there is too much fiddling on these early RB motors for too small a benefit.

So I am now looking for a core PS pump from a 1962-1965 413 with factory AC, as the pulley gets called out with a specific part number for the AC application, that being # 2128338. Anyone have a core lying about?

As I mentioned in my previous post, I did not receive my original pump back from the rebuilder, but a later style, application unknown. I see now that after the bead blast finish has worn off the pulley V groove, it is clear that this pulley is junk. My shaky pump certainly could have been influenced by this bad pulley. There is more.

Yet another obscure question from me. I recently viewed a number of Chryslers with factory AC. My car had the AC support bracket forward of the PS mounting bracket, these other cars had the AC bracket inside of the PS bracket. That is about a possible 1/8” alignment issue at the pivot point, in addition to the hinge slop within my two PS mounting brackets not really allowing me to visually line everything up.

When my AC support bracket is tight at the compressor, there was a 1/8” gap between this bracket and the mounting boss where my PS bracket slipped in between. See attached.

That is how I found it, in between the AC bracket and the engine mounting boss. My bracket does not appear exactly square, so tightening the pivot bolt with the brackets in the wrong position could have bent both AC and PS brackets to suit. 2^nd attachment. So nothing to be sure of here.

All advice welcome!

Allan Pozdol 300 K