Russ, I am not a body expert, but I have seen where other guys had to drill holes in the metal, then press the body filler into the holes and spread it on the flat surface. They were then able
You might try 'Ford, The Men and the Machine' by Robert Lacey. It's a history of the Ford family, their cars and the industry, with a lot of references. Keep in mind that Henry was into racing before he built