I had some issues with my aftermarket fit. The length was good, the curvature was decent fit to the 1/4's, but the top was not very flat at all. I had to blend the curve some to fit the repro 1/4's (Dynacorn), and had to spend prolly 8 hours making the top of it flat like it's supposed to be. I actually broke thru the glass trying to get it right, meaning I had to rut out a piece and reconstruct material on the inside of an inaccessible cavity (major PITA). In the end, it was faster (not cheaper) for me to get it fixed vs. if I had sent it back for another which more than likely have been the same or worse....and I would have been out more money for shipping.
These pics are on my 69 Camaro (don't judge me....I like it) that I built....
Believe it or not, that spoiler is dead flat, top and bottom....
