Quality fiberglass companies

I thought I just heard on a Barret Jackson auction the other day that the fiberglass hoods weren't supposed to fit flat with the fenders. The deal was the people that made the fenders and hoods back in the day were actually different companies and they didn't work on the same dimensions or whatever, so the hoods had a slightly bigger arc to them than the fenders, so the hoods didn't sit flat out of the factory. I don't remember which car model exactly, but it was either a Challenger T/A or AAR Cuda, so that might have something to do with the fit. They may be making a "factory correct" hood, not a show quality hood.