I have a project car I'm rebuilding that a previous owner attempted and made a mess out of. None of the panels were installed properly and he's hacked into a lot of them and filled and evened with tons of Bondo. As a result I have no basis or measurements to take that I can be sure of as I attempt to correct his mistake. From both doors back I have to change EVERYTHING, without having any good reference points to measure from. I'm at the point of test fitting new full quarter panels on but have no real points of reference so I have a few questions on how to proceed. The only thing I can do is align an even gap along the bottom of the door to the rocker panel but I'm not sure what that should be so does anyone know what the average gap between the door bottom and rocker panel is ? after that what should I do for the in and out adjustment as the quarters are off, how do I set the door ? I suppose I set the bottom gap equally and then test fit the quarter and then try to adjust the in out of the door so it matches ?... and if so what do I at the rear as there are no panels there to align anything to ? excuse the huge pic, but as you see there's really not a lot to line anything up to and the only reason the door gaps look good is because they filled it in with bondo to line it up like that to hide their mistake... How would you proceed ?