Hey all, I am about to do some major surgery on my 79 Troopy, and would like some dimensions before I start cutting so I can support some of it in the right spot... Can someone get the rear door opening dimension from side to side? Ideally both the small dimension where the seal mates and the bigger dimension that is visible from the outside with the doors shut. Also, what is the dimension from 1 body rail to the other at the top (the small rib that goes into the top channel)? Inside and outside would be nice here too (probably roughly 1/4" difference between the two). When I measure mine I get .75 variation from one the front of the rail to the back of the straight section, so I have no idea what it should be.