Need some help towing a 77 K25 on a towbar

[wyattglock]

I am pretty sure that UHaul doesnt have a trailer that will handle a full size 4wd, that has been my experience with them. As to using a tow bar, I had to flat tow my R3500 crew cab dually from Grand Rapids, MI to Lafayette, IN. We pulled it with a 2005 K2500 HD with the 6.0L. That truck almost couldn't handle the dually due to the weight. The other way around, and a few months later, and my dually didn't even notice it. So if you are pulling it with a C30, you would have to go slow and be careful, but it can be done.
We made a bumper out of 2 pieces of 2x4 box steel that was bolted together. The inside box was cut to fit very snugly between the frame rails. Then the frame was drilled for 4 grade 8, 1/2-13 bolts. We used grade 8 bolts throughout, and also used the Reese towpower bar kit. Since the dually was heavier than the tow vehicle, we found an off ramp that was long, straight, and had a shallow uphill grade. Then we loosened the bolts on the towbar and allowed the dually to pull the 2005 Chevy backwards about 20 yards. Then we stopped using the dually and tightened everything back up. This allowed the alignments of both vehicles to come in sync with each other, had no problems towing at 70mph the rest of the way home.