Aluminum case 833 identification

I had one out of a dodge ram with both mounts as you described. It was an overdrive unit with a 4spd shifter mounted on it and it was installed in a car. Guys would use them for overdrives years ago and keep the car shifter. You just have to shift from second to 4th position and then to third position for OD. Put on a show in first and second and still have the overdrive. It was a performance loss for the muscle cars but economy for those trips going far away for events. Years ago I mad and all aluminum 4spd for an a-body. But it used a small 904 style slip yoke.