The beginning of "They call me Mellow Yellow"

[Robert Johans]

Originally Posted by Borden

The custom part is the Hitch which is fastened at the back like normal but then the 2”center tube snakes forward under trunk and gas tank to refasten forward to the car.

???

[Borden]

The Class III 2 inch receiver is needed for Weight-Distributing Hitch. The unit in fact is supposed to distribute the weight to the center of the car when setup correctly. In most cases they fasten on sides at rear and the center 2” receiver ends about 8” forward. In this case the center 2 inch tube continues forward and follows the profile of the underside of car to be reattached. This design is due to the car being unibody reducing stress on the body.

Weight-Distributing Hitch systems are intended for heavy loads if vehicle can handle 200 lb. tongue weight without a WD system on rear then it then can handle 400 tongue weight with WD system when setup correctly; setting the vehicle limit.

[Borden]

Quotes:
Class III hitches can handle up to 5,000 lbs. GTW and 500 lbs. tongue weight. This type of hitch generally has a 2-inch rectangular receiver and is considered the "standard" type of hitch for general towing.
** Weight-Distributing Hitch: This type of hitch is an attachment that slides into the 2-inch receiver to redistribute the weight on the tongue. The hitch usually has two spring bars, one for each side of the trailer, to lift and apply leverage to the tow vehicle. This redistributes weight from the rear axle to the forward and improves vehicle stability while towing.

[Borden]

When I get a chance will have to take a picture of the rig.