I second Phil's suggestion of pictures.
We definitely need a better description of the issue. THEN we can be of more help.
When I got to installing the passenger door on my reconstructed cab (new rocker panels) I discovered some interference at the top corner, as well as at the rear lower edge. It seems I didn't maintain the proper distance between the Hinge pillar and the stricker pillar. It took some grinding and welding on the door edges to correct the door fit.
