This remains a bit of a mystery to me. I found the headliner bow, and it definitely screws into the roof brace at about 8 locations. This would suggest that I own the older style cab. On the other hand, there are no mounting holes for the windlace tracks around the door openings. The tracks were welded in place. Is it possible that I have the older style headliner and the newer style windlace? Anybody have any pictures? Thanks.