Oddly enough I use to install the Dana units for Sears back in the early 80's. They sold a lot of them... In comparison, things were very primitive back then with hook ups, bead chains, cables, magnets on the driveshaft, but they worked.
I also installed the Rostra #RPC-250-1223 universal unit, but on a 98 Explorer EFI motor and 4R70W. I used the signal off the mustang VSS on the speedo cable, which made the install a breeze. Couldn't find the part#, but used the Rostra universal control switch which goes on the turn signal arm. Very pleased with its performance, and I believe Dirtdonk is also happy since he bought my Bronco. Those long trips to Wildhorse's and back from Sam Jose!