So far so good...the truck has _not_ fallen off of the blocks yet (the ground is still holding), and the mechanic I spoke to said that he'll be able to get the tires swapped out on the rims though it was, in his words, a remarkable pain in the ass...something which made me feel a bit better about my inability to get the dang things off on my own. Should have the tires back this week...and will promptly mount them back on the truck.