Remote PS reservoir fitting?

Anyone have any experience on the OEM power steering pumps and a fitting to remote mount the reservoir?

My brother is working on a 6.4 swap into a '71 Demon and is planning to use the OEM 6.4 pump but hates the stock reservoir. That and it hits the fabricated valve covers and won't allow the pump to bolt up.

I found a return fitting off an '05 300 with a 5.7 that should have worked but the hole in the 6.4 pump is too big. I thought maybe the 6.1 pump would have a different fitting, the pump is a different part number, but can't find a way to verify it.

Anyone know of a fitting or know if the 6.1 pump fitting would work?

This is the fitting I am referring to:

Screenshot 2023-03-22 095020.png