[Love 70 Chevys]

Wow! Your video was really good. Now I completely understand the problem. Great explanation. Now that I see what you ran into, I think I might try just cutting a "window" like the sketch below before doing anything. Then, when it comes time to put on the outer rocker, I can let the door and fender decide how high it should be and then slide a simple "L" bracket up from the bottom to kiss the underside of the rocker. Based on what you have been through, do you think that could work? Please keep posting your progress, you have come a long way.