I've also got 2 611s to get rid of. But instead of using the NiCd packs, I went with 4 C NiMh batteries. Very fast recycle time.
With a 160 GN there is plenty of power for medium format or 4x5. (10 ft @ f32 @ iso 400)
For connecting to a pc connector, cables are readily available. The connector is compatible with a household slave as well.