1958 GMC Front Clip Question

[angelobackwards]

Hello all, I'm new to the whole restoring and customizing addiction as well as this site, and am looking for a little help/advice. My father and I are restoring a 58 GMC. The truck has a 72 Monte Carlo front clip installed by the previous owner who knows how many years ago. Anyways I have been putting the front sheet metal on and noticed the that the two radiator mounting tabs that are supposed to bolt down on the frame to help mount the clip are not sitting on the frame. The driver side side tab sits on the frame but the passenger side is about 2-3' away from the frame. Does this mean the frame is installed crooked or is it simply because the clip is wider that the original frame rails? I can get pictures tomorrow if it'll help to show what I am talking about. Thanks for any advice. I also enjoy reading all the builds they give me some great ideas that I never thought of, now im just working on getting the tools to do them =/. Anyways thanks again for any advice and help.