40 Deluxe....Going back to when I was young and shearing teeth constantly, a pick-up transmission was readily available at the local scrap yards. What is done to put them torque tube style was to simply exchange the open drive center shaft, along with the rear mount and you were back in business. If I remember correctly, the first gear ratio was low, being a pick-up truck and not very good for us. They are definitely not stronger....we blew those just a fast.....I still have a few of those in my stockpile, but none have the lower case full reinforcing rib making the set-up stiffer under load. FYI....Robert