Bill,
Thanks for responding. Is that your Task Force truck in the photo? Nice looking paint! My favorite color! I am working on a '65. The problem I am referring to is less on the task force design, but is very prominent on the 60-66 and also on the 67-72 models. What I am calling a "kink" (out of frustration for me), is more of a gentle rolled edge or curve that runs from the top on the fender towards the bottom...usually getting better at the bottom. It is about an inch wide. I have the book, "Chevrolet Trucks" by Mike Mueller at home and the problem is clear on the photos of the pristine examples in the book. In fact, the cover shows a gorgeous, black 55 first series in contrast to a red 55 second series and the "kink" is obvious. I've been fooling around with these ole trucks for forty years and I guess I am a perfectionist when it comes to body gaps and such. If I am painting a show car, I will spend many hours shimming the panels until the best fit is achieved. Then, I will put a skim of filler right across the door gaps...cut my gap perfectly while the filler is half-hard, then block sand until the joint/gap is perfect. Bear in mind, I am only talking about a few thousandths of filler here and there after I am finished, but the results are dramatic. No matter what angle the light glints off a panel done this way, it always looks great. The trucks however, on the series I've mentioned, can't be done that way because the metal is curved inwards towards the centerline of the truck all the way down the door skin at the edge that is adjacent to the front fender. I've discussed this with Tony Smith at 4-5-6 Trucks and he looked at all the trucks in his corral and said about half were that way, and half weren't. It seems to be something variable about the way the factory crimped the door skins onto the sub-frames.
Jim