I don't know about a car dolly, would probably be about the limit weight and safety wise.

I have towed one with a tow bar with all 4 wheels on the ground.
[img]http://thumb9.webshots.net/t/58/458/3/29/25/2811329250080251109DYqOrz_th.jpg[/img]

It worked quite well for the about 3,000 mile trip from WA to NY. However, I would not want to tow a truck that weighed more than my towing (lead) truck. Brakes and weight over the rear wheels of the towing truck are very important things to consider.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-