A904 Hard 1-2 Shift and Reverse

I'm no trans expert, but an easy thing to check is the adjustment of the kickdown linkage. download your service manual at mymopar.com and follow the procedures. I would first check its operation before making any adjustments.

also post up a lot of photos! engine compartment, carb linkages outside car all angles, inside the car etc. that way we can all geekout with you on your new find.