errr thats a pretty reckless suggestion.

for starters, have you broken it in?

only thing you can safely do to help it wheelie is to tighten the slipper. (and you then risk drivetrain damage, but a little bit should be ok, dont go crazy with it though)

but an engine continues to increase in power up through the 1st gallon of fuel.

Might I suggest you not destroy your car trying to tune enough power for wheelies. they mean very little, and are actually negative to the cars performance. they look pretty the first 5 times, than you get tired of flipping it back over and having such a touchy truck. they will come eventually, and when they do you'll wish they didnt.