I built my own tow bar. ONe I used square tube and fancy joints. Next one I used 1-1/2" tubing, and made truck end flat welded plate with pivot holes. I remove the bumpers on big trucks, usually easy with couple of bolts in frame rails each side. Then I use thick flat stock, or heavy angle iron, place along frame or inside or outside along top or bottom if I use the angle iron. Drill holes in irons to match orig bumper holes, bolt on with new hard bolts. I used big 3/4" bolts for pivots to tow bar ends, and use double lock nuts to leave some loose to pivot up and down. I used a standard trailer coupler on other end, 2" ball and mine swivels to adjust widths. You need a brace bar going accross it to keep from swinging when pulling though. I have safety chains on it, and still run a chain from one truck thru bar and to other truck. I then hve a light bar set up with magnets or strap on back of towed truck and use extension cord wire to hook up to the trailer connector on tow vehicle. With good ground it works good for brakes and turnsignals. With air in tires, it will follow you anywhere, with no need for driver in towed truck. I keep speed down to 35 if possible, but have done 45 if needed. With truck rolling you can use a big p/up and still pull ok. Braking on wet pavement may cause lock-up, but dry is good. U'haul has clamp on tow-bars, never tried one, but they are fussy on what size tow vehicle you plan to use with it. Plenty of space and lips on those old bummpers.
Sometimes you just gotta pay for towing, and bite the bullet. I have a local big truck tow freind, and get him, usually only $35 for short runs! The more ready to go with it, the better he likes it. He can lift either end if bad tires or such if required. Good Luck!
