Spent about 2.5 hours at the hobby shop trimming and cutting. 14 TPI Bi-Metal blades on the recip saw cut the bumper support like it was butter. A heavy duty box cutter and a couple of blades made quick work or the urethane too. I still have a little trimming to do here and there but it looks good.
Just need to wait until dark to re-align my HID fogs...
Thanks to AZDave who gave me some good pictures for cutting references.