If you want to use ramps, maybe you could put some 1.5inch planks for the rear tires to rest on, that's would maybe help your bumper clear the angle, a little more.
Keep in mind, I missed this cause I suck at blatantly obious things. You can't work on the suspension with the ramps... cause the wheels are still supporting weight.
in another (un)related vein, anyone else hate the little ridge you're supposed to use as a jack point on the frame?! Seems like all the ****ing jackstand I use have a deep V cut out, and are next to useless for my aplication...
Also the jack stand shanks make decent wheel chocks in a pinch (then again, so do old rotors, eheheh)
-PHiZ