PW I really DO think that Mack of yours needs a thread all on its own.

I am a sucker for old big rigs. My grandfather owned a couple of full service garage/gas stations back in upstate NY, and also had a wrecker service. He was the first Firestone tire dealer in upstate NY. At the high point I think he had 12 big GMC C.O.E. wreckers.
He was down to one station by the time I was born, and the wrecker service was gone. He still kept one of the trucks and another was converted to a dump truck for my Dad's business. I used to love crawling around playing in those things.