Do you want an SAE housing or Dodge, manual or auto? If Ford retainer diameter is anywhere near Dodge?, and shaft stickout close, just adjust retainer diameter, AA makes retainer spacers, drill and tap new mounting holes in clutch housing, might need spacer.
OK, the part numbers for that Ford adapter plate are 3908022, 3910515, and new number 3912601. Requires starter spacer 3934080 if you use the stock Denso starter. The adapter plate new from Cummins lists for around $1400. Ouch. See used ones occasionally around the $500 mark. There's one of ebay right now for that. It was setup for an automatic and has an extra hole in the plate for bolt access. Here's a link to that one. 6bt 4bt Cummins Transmission Adapter Plate Small Block Ford Bellhousing 5.9 3.9 | eBay