Boofhead,
For the B747-200, the 2-engines inoperative Vmca with Flap 1 set is 146 KIAS for PW JT9D-7J engines and 152 KIAS for RR RB211-D4 engines. These are the only figures that I have seen published and are related to the 2-engine inoperative go-around procedure.
Rgds
Lomcevak