I am currently trying to figure out what steps I need to take to double wall my rocker panels on my 65 Dodge Coronet 500. Would a guy just buy a repo rocker and weld it inside the one that is there? Also I suppose you would need to seal the inside between the two to prevent rust. I am not doing the work myself because I can't weld anywhere good enough but would like to at least have an understanding when I speak to my body man. Thanks, Alan