Well, so far I can only find the part number for the DC extension housing- P3751028. No luck yet on cases or complete assemblies. I swear they offered them, they used the 18 spline front bearing and collar (not the oddball OD one) and a bushed case for the countershaft (weak point in the OD cases). Maybe I'm just beginning to suffer from OFS (Old Fart Syndrome). I will update if I find something else, but at this point I would think if the case casting date is pre '73 or '74 ish, it's a DC unit. Or I'm delusional and should just shut up and go have a beer.
