I used to play an organ that had a 122A and one of the Hammond tall boy tone cabinets. When I played them both together, it actually had a pretty nice sound to it because the Hammond tone cab gave more bass response than the Leslie. It was actually a pretty nice, full sound. If I were to do it again, I would see if I could disconnect the treble speakers on the Hammond tone cab so I'd get only bass on it.
It's not uncommon, also, for some organists to unplug the bass motors in a Leslie so the bass rotor doesn't spin at all or it spins only on fast. Having the spinning Leslie sound is more important in the higher ranges than the lower.