A500

Are you sure it's an A500. V8 Dakota's came from the factory with the A518, it was the v6 and 4cyl motors that used the A500. FWIW, in the early 90's mopar renamed the A500 to 42RH and the A518 to the 46RH, same tranny different name.

A buddy of mine put an A518 in his 67 Barracuda behind a 340 6-pak motor with 4.10 gears. It's a real nice set up. It does require some significant surgury to the floor of the car but he was still able to put the factory console and floor shifter back and from inside the car you would never know.