I asked about this on my thread. But I wanted to get some opinions from people not reading my dribble.... So, obviously a F1 box doesn't just bolt in to a model A frame. In "The Book" as it will be refered to. They recommend cutting off the end and welding the A end on to it. I'm sure this works great, but why is this done? Is it to get the box closer to the frame? I was thinking at first, Why can't the flange of the box be shaped to that of the model A? But maybe that is to close to the motor? Is it the exhaust that gets in the way? I don't have manifolds yet, so I can't test that.( unless 8ba ones work on 59AB's) I can think of a few other ways to do this too. One of which Tank posted on my thread. Turn down the box's end to press fit the A flange onto. You can view that post here for pictures. http://www.jalopyjournal.com/forum/showpost.php?p=6967067&postcount=294 That would allow you to modify the distance it is mounted from the frame rail. Not to mention that you could also modify the frame to just fit the f1 box, but that would be a little unattractive. So what am I overlooking?