Actually I have thought about that for a while now. They used to use PVC pipes on our hoses and dyno ends at my work place because they were cheap. One of the major drawbacks was the heat issue and the softness. I had not ruled it out and the only way I see it working is by alternating trucks. The PVC will have to be long enough to reach the tailigate so they can attach the tubes there. It will take 2-45 degree,2-90 degree,2 long pieces of straight tubing to do it and a couple of small rachet straps to keep them tied down. . Attach the 90's to a small piece of straight,then use the 45's to route the straight to the bed floor where the pipes can be attached. The problem is heat and we would have to stagger the stack guys to make it work.
To do it right have some help for the guy before he enters the bay and slide the tubes over and tie them down. That way when he pulled in all we would need to do is put the metal extensions on the end and dyno. Then when he is done,pull out,give them to the next stack guy,tie them up and they should be ok for the next rip. Not sure how they would hold up but we could get the stuff and try. Any thoughts... ... . Andy