I am thinking about building a tool to use to push the wheel wells out just a bit. I need what looks like about 1/2 inch even after trimming the lip. I have drawn up a jig using 1 inch square tube then notching it and bending it until it is the shape of the wheel arch for the 67. Only about the upper half to 2/3rds of the arch. Then a pusher bar located across that that would then use a porta power to ease out the wheel well. I successfully did this on a 65 Mustang with more primitive wood blocks and never left a dimple or a mark. Car is in primer so paint won't crack. Anyone ever done similar?