[bouncytruck]

Single wall tops bolt down from the top of the bedrail and are much more desireable.

With the cage in your rig, you can mount front and rear shoulder straps to the cage. There was a guy on the board who fabricated some nice brackets to run shoulder belts. You can also just weld on some tabs to mount them to as well.

Good luck on the trade, I'd love to have a long-bed trailer to pull behind my '72.