Finally got a chance to use all 4 of those big ass 10 ton jack stands I have.. the ones that go up to 46" tall.

I jacked up the truck, set the rear bumper on those 4 jacks (two in the back and one on each side). Undid the mounting bolts, jacked the truck up higher and cut off the sides of the quarterpanels that I did not cut up high enough when I mounted the bumper the first time. Lowered it back down and back into place. Worked awesome. Also found some (4) stripped out bolts holding the bumper on (bummer) so I went out to Lowes and bought some 1/2 grade 8 hardware, drilled the holes out to 1/2" and got them tightened up. Did not take pics as I was busy.. needed to get it done tonight.
Here is a pic of the jackstands.