I've now found my old piston DC-3 Manual, and I hesitate to post any more figures for the moment, as it would seem to indicate that it out-performs some turbine DC-3 conversions, about which I know very little.
Think I'll wait for someone else to post some more turbine figures first. Incidentally 12,200kgs/26,900lbs was our MLW in the 70's. 12,700kgs/28,000lbs was our MTOW. Do I take it a blanket airframe restriction was put in place at some time?