You cannot even tow a 6 x 6 with another 6 x 6 if you have no weight transfer
or brakes.
I flat towed a CCKW chassis and cab with my CCKW cargo truck. I could pull it
fine, but stopping. Well I locked up all 10 wheels and the other truck just
pushed me down the road. There was not enough weight on my tires with a flat
tow.
Steve