Couple things we do to help this:
We tie our calves with their head high for 4-5 hours a day. You have to work them up to this - but at a show I want them to be able to stand in a grooming chute for an hour, in class for 30-40 minutes, and the final drive for 30-40 minutes. If they are not used ot standing in the correct position for an extended amount of time - you will see that they get tried of standing fairly quickly.
Secondly, wehn we have a 'dead head' - we use a pronged show halter from Sullivans or Weaver - do what was suggested before, - while leading and setting up durring practice, jack their head up, then when they get to where you want - release pressure a little, the prongs will be uncomfortable to them, and they may fight it a litte at first - don't give up.
Cyfarmer