We also used the A340 wings on the A330 tanker. These wings already had hardpoints and fuel lines for the outboard engines which made our WARP (wing aerial refueling pod) installation far superior to the 767's.
Just as a point of interst, I believe that all A330s use the same basic wing as the A340 hence they all have potential hard points. They also share the same centreline mountings for landing gear as the A340.