sparkyinak:
A solution that one of my guys used was...
6" unistrut 2 piece pipe clamps, mounted on thin strut attached to the roof racks.
It worked.
One drawback to using the PVC with the PVC end cap is if you get too 'pushy' putting EMT in, you could break thru the front cap.
BTW, the American Van item was put on two of my other vans.
Happy New Year
