5.9L/360 Magnum - 1965 Plymouth Barracuda - Stock Fuel Injection
OBD-II vans came with 3spds. Usually the 6cyls are the ones you see with them, but 360s aren't that uncommon with 3spds either. It seems like they may well still be hydraulic too. Sure seems like at least up to '99 the vans had 727s with 360s and seems like the 904s were in it for the longhaul. Worst case scenario- one of those computers should make sure the motor is happy ahead the 3spd.