I had to trim the top lip back until the triangular mounts on the frame mounted on the inner door panel nice and flush. You will need to cut back enough so that the front frame rail can fit between the door and the body side-window recess. I think I have a 3/16 inch gap between the door edge and the lower window frame rail from front to back. I just drew a straight line along the top of the door and trimmed it in small increments so that I wouldn't over cut.
It's just a matter of time.
FFR Coupe # 434. Power Brakes, 347ci, Carb, 15 inch Hallibrand pin drive, SAI, 3-link