Little bit of an update. I've been fiddling with the Dart a little today. So, turn signals do work; however, the housing/lever still spins. Basically the turn signal lever stays somewhere between 9 and 12 o'clock on the steering wheel. The cam I replaced does work, luckily. I don't remember the steering column being like that when I first had the car, but I guess it works now.

Also, there is still some sort of leak. It's in the same spot, right underneath where the bell-housing connects to the engine and the exhaust swings over from the passenger side exhaust manifold. I checked my oil levels and they were just a touch bellow the "safe zone."