A woodchuck could (and does) chuck around 35 cubic feet of dirt in the course of digging a burrow. Reason dictates that if a woodchuck could chuck wood, he would chuck an amount equivalent to the weight of the dirt, or 700 pounds.
Oh… was that a rhetorical question?
Everybody knows a woodchuck would chuck as much wood as a woodchuck could chuck if a woodchuck could chuck wood.