Master cylinder puking fluid

I recently posted a message regarding this same problem with leaking
on my son's Dart Sport. I'm considering installing one of the newer, lighter, aluminum master cylinders with the screw-on caps, found on later model vehicles. I understand it will require a 2-bolt to 4-bolt adapter, but I still haven't gotten a bead on the correct replacement M/C to fit an A-body.

Anyone done this swap who can provide a good part number, or at least
the vehicle it is listed for?

Jerry