So will the winch go between the tandems, or more up by the cab? I'm assuming a little boom head/ sheave mounted to the top of the lift tower?
I'm also guessing the winch is to drag a dead one out from under the trailer so you can swap tractors.
I got to use my old winch truck the other day to pull my rt out of a mean hole, so I keep dreaming about wreckers, but I haven't got myself fired up about a 2 am call on a accident/ breakdown. I just can't see myself making it to a crane job the next day if I work all night. Doesn't mean I still don't look at them. This one showed up the other day, and I thought about going and looking.
https://fayar.craigslist.org/hvo/d/heavy-duty-wrecker/6547205721.html
1984 Marmon heavy duty tow truck, has 400 big Cummins engine, 13 speed fuller transmission, fuller rear ends, spring suspension, 11R 24.5 tires, front tires 90%, back tires 50%, 20 ton telescope body, wheel lift, dual winch, ready to work, everything works $35,000