Well, I got the Motorcraft SW2433 sending unit this morning, and put it in. It replaces the stock sending unit perfectly, it looks as if it could have rolled off the assembly line that way.
It's harder to get, there are only two Ford models that use it, but well worth the wait.
One of them is a 1993 Mustang GT 5.0L 302CID w/gauge
My first mod, a fully functional oil pressure gauge!
1997 Grand Marquis GS - Died
Now have a 2003 Grand Marquis LS