Looking to buy a camper shell / cap / topper / whatever you want to call it. The one that sits flush with the roof line and encloses the bed. Planning to use it only occasionally when we move. I've heard there is some incompatibility with a shell designed for a 6.0 if you have a new tailgate installed. Any idea if an 08+ will work on the older body style (2006) with a newer tailgate or is there no solution?