need help with my 4 speed tranny

The bellhousing you have is for trucks with the new process 435 trans, or the "granny gear" trans as some call it. Your transmission is also out of a truck but is a NP833 and is a overdrive unit. Take note of the loose bolts on the tailshaft housing, did you take them loose or were they like that? Better check it out good before going to the trouble of putting it in the car.