That is indeed quite a picturesque drive, I have..
been over the Beartooth Passage and through the Absaroka Mountain chain several times. In addition to the incredible picturesque backdrop for a gorgeous drive, the area boasts the best fly-fishing for trout there is on the planet! (which has been my reason for being in the area ;-D
Just wish I had a Z8 to drive when I am in the area -- maybe I could borrow one of yours ! ;-D