440 Dart Sport 4 Speed ?

I did some more research. It looks like I have a 65-70 B body 4 speed. I guess I will be looking for an A body unit if anybody has anything.... Is it possible to just change out the tailshaft on my B body trans to a short tail shaft?

You will have to get an A body tailshaft and the shorter output shaft to convert the 4 speed to the shorter A body tranny. However, the parts can be as much as a complete transmission.