Many thanks! I will just have to fab something up I think to connect the rails to the cross rail. More angle iron. Otherwise the cross rail is attached only to the trunk pan. Makes sense. I need to crawl under there some more but I believe the bottom of the existing frame rail hits the tail panel (and will hit cross rail but I didn't mock it up - not enough vise grips!), so I'll have to trim it at an angle to clear.