Big Caddy,
All Advance-Design 3-speed and 4-speed torque-tube transmissions are the same length.
The only Advance-Design torque-tube transmission that has a different length (longer) is the 1954 1/2 ton Hydra-Matic. As a result, the Hydra-Matic torque-tube is shoter than manual transmission torque-tubes.
Tim