http://en.autos.sympatico.msn.ca/advice/standardart.aspx?contentid=4021943

the Prowler was actually mentioned....this is a quote:

There are but two short seams of MIG (Metal Inert Gas) welding in the entire car, while within the door structures is just a handful of "clinched" parts, held in place mechanically after being pressed together. The rivets - some 3,180 of them - deserve special mention. Similar to those used in the now-discontinued Plymouth Prowler, they can attach up to four thicknesses of metal. They don't completely pierce the pieces, but expand part-way through to form a smooth, tough bond.