Ok, you guys get the first test run... Did these on my wife's new iMac. Anyway, here are the pics. For some reason the black interior didn't want to light up very well. You can see the retractor mounts flush to the floor, with the belt anchor behind it. There is a 1/2 twist in the belt, probably because of the way a van would mount them. As it turns out, the belts used the stock bolt mounts with no hassles. The center hump anchor ends were bolted into the stock holes and reinforcements. There were a set of reinforcing plates in the mounting kit, but I didn't think it would be necessary over the plates that were already present.
http://web.mac.com/khansen6/iWeb/Site/Seatbelts.htmlGive it a whirl, hope it looks as good on a pc as it does on this screen.
BTW, B-Bodies had provisions for shoulder belts through the package tray. Perhaps something to pattern against.
*Update* Not surprising, IE doesn't like that html. Click on the space above the image name, and the image should pop up.