I'm doing this right now on my 58. Red58 is right about the front of your frame and the hood mounts. But these are easy fixes. You just cut the frame and drill new hole. As far as fitment issue you have those anyway when building a car. Have you ever replace doors or fender with those that came off another car? Fitment issues, After market parts? Fitment issues. Thats why you mock everything up.
