Change a 904 to manual valve body

Try the wanted section and see if you get one. Here's some reading if your up for it.
904 Kickdown throttle pressure adjustment question | For A Bodies Only Mopar Forum

There is a screw on the Trans. that controls pressure as well that is talked about in this thread but no info on how to. Something about a tool to set at 9/16". Maybe FSM
A-904 Throttle Pressure Adjustment | For A Bodies Only Mopar Forum