Denny Graham,
According to the "Book of Bolts", your 3/4 ton should have floating bushings and pre-fitted pins.
This means the bushings fit into the spindles with a palm press fit, and the king pins fit into those bushings with a palm press, or light 'tap' fit...no reaming required.
Although there are certainly exceptions, this should be how it works. There is a Tech-Tip article that covers this...take a peek.
If oversize king pins are required, the axle eye is the item over bored, or reamed. This should be done in a precise fashion by a machine shop.
Stuart
