Stop in for a cup of coffee

Wait.
70’s full size vans had 904 transmissions?i was out looking for a correct water pump bolt,the flex plate from the last engine/transmission appears to fit the factory 65 barracuda torque.
So im wondering, should i rebuild the newer one and go with the slip yoke? Im thinking i can modify shifter to work.
If the vehicle was 1975 or later, it got the A904 LA with either the 318 or 360 engine. It was a beefed up A904.