Thanks for everyone's opinions and ideas.
I know that gaskets will fill gaps. I see some cars out there where the gasket will be squeezed down to nothing in one corner of the taillight bezel and a 1/4 inch thick on another corner. I don't think that looks so good. Is that the best you can hope for with reproduction parts?
I see other cars out there that seem to be an almost perfect fit all the way around with the gasket barely visible. Are these original parts, better reproduction, or someone who just got lucky?
I wanted to see if my problem was the tail panel, the bezels, or both so I took a piece of wood cut it in the shape of the bezel, put a screw through it at each corner, and adjusted the screws so that the end of all four screws touched a flat surface at the same time. (the end of all four screws were in the same plane). The I put the screws up to the taillight openings and the new OER bezels to see what might be warped.
What I found with the taillight openings was that the top, outside corner on each opening was pulled in a 1/4 inch from the other three corners and that the OER bezels seem to be flat. (All four screws touch the corners of the bezel at the same time)
I guess my questions now are......Is this the correct shape of the tail panel and the bezels should have be manufactured to match?.......or is the tail panel warped and the bezels the correct shape?
I haven't tried this yet since I don't have gaskets yet......but if you crank down all the stud bolts and draw the bezel tight to the tail panel, are you going to notice distortion in the tail panel?