Victor K2 MTOWs: Wartime - 238,000lbs. Peacetime, 223,000lbs. In flight, AAR could take the Max weight to 238,000lbs in peacetime. An empty K2 weighed in between 115,500 and 117,000 lbs.
The Victor had a Mk17 HDU on the centreline and Mk20B pods on the wings. These differed from the pods on the VC10 in that they had their own hydraullic system powered by the Ram Air Tubine on the front of the pod. Ths was used to wind the hose in and out. The RAT also powered the fuel pump. The Mk32 pods fitted to the VC10 just had a fuel pump powered by the RAT which did the winding as well as pumping. The Mk20 was also fitted to the Sea Vixen and Buccaneer in the buddy-buddy role. It had an internal fuel capacity of about 1000lbs and in these aircraft it provided extra tankage. In the Victor however, the pods had to be empty for take off and landing and full in flight for wing bending relief.
The Hecules Tankers had a Mk 17 HDU, the same as fitted to the Victor, VC10 and Tristar.
I don't know about the MA4 Bison, but I did see a Harbin H6 tanker recently.