wtb: Driveshaft for 65 dart 273 4sp 8.75 trunion

Well hell you need to actually measure it. But I would not put a ball and trunnion under there for love or money. I don't have the info at my fingertips, but there is hardware available to eliminate it, that is, a slip type yoke on the shaft more like a 4x4 front shaft, which will still bolt to your factory transmission flange