We started by welding in the tube here right above the radiator. The first tube is critical to the overall orientation of the body. Mounting a body is an extremely difficult proposition. Many, many people have ruined otherwise wonderful bodies by not knowing how to mount them. Mounting a body is a 3D problem. Most people don't think in 3 dimensions and so the body ends up off in one of the dimensions. It takes a long time and a lot of measuring to get everything lined up correctly.