The Hydra-Matic truck frame has a different cross member under the Hydra-Matic tranny.
The cross member bolts to ears riveted on to the frame.
There is also an additional cross member at the rear of the Hydra-Matic transmission (it bolts to the frame rails).
Be sure to obtain all the shift linkage (from the inside steering column to the transmission to the carburetor).
The torque-tube is shorter on a Hydra-Matic - you will need that.
If there is a starter button on the left front of the dash, get that, too.
