[elmariachi]

Yep, I wish Santa would bring me one of those tanks. You could spot weld the bolt heads like Larry suggests and then use some rubber or nylon washers between the tank and rails, and then use locknuts. So you get it snug enough to stay put but its not hard mounted. If I were doing it again I would have cut the floor out of the trunk tub and finished it in aluminum like the original cars. With a removable trunk floor things would sure be easier to access.