I've got a 1990 CH613 for pulling around my 5 walking floor trailers (So I can leave them and let clients load them and then pick them up later) and 1999 Eager Beaver 35 ton RGN as well as a 30 yard dump trailer. Even when the truck is literally within pounds of its 80,000 pound gross weight while pulling 100 yards of leaves or wood in one of the walking floors it still pulls great. Personally I prefer the DM to the CH, but that is probably because the DM reminds me of when it was new. I bought the CH two years ago for $9,500. It has a 350HP engine in it. It has near a million miles on it (I think. The odometer stopped working.) and the only thing I've done to it is change all the lights out to LEDs and I lent it to a local shop so they could fit up an aftermarket intercooler so once they fit a new one to the CH models they put a new one in for me for free. Then a little while ago I had to put a new transmission in. I got a brand new trans from a local shop and had it back on the road within 3 days of losing the old trans. Long story short: There is a reason their hood ornament is a bulldog. Those Macks are great trucks.