Hood and Grill Surround question

[tazattitude]

I installed my hood and grill surround. When I close the hood, I have an inch or so gap in the center of the hood to grill surround. I see some pics where the gap is consistent all the way across from left to right. Mine has smaller gap on both sides, and big gap in the center.

My question is, is there a difference in hoods OR grill surrounds? I've seen the grill surrounds with rectangular or square indents where the headlight goes (mine has the square). Also, it seems in pics that some grill surrounds have a slight curve on top and some are flat (maybe an illusion in the pic?)
My hood supposedly came off of a fire truck. It had zero rust on the front nor did I have to do any bodywork on the front of it so the front is stock. The grill surround is factory.
I have a 66 C10

Any input would be appreciated.