Looking good! To add to what Grubby says, your gloss paint is really strong and shiny but your rims not so much. Can you beef up the chrome plating on the rims? It looks like there are a few more steps in the rim ring as well.

And the tires, is this a specific car or is it supposed to be a stock Shelby?
I'm not 100% sure but I think this car came stock with Goodyear tires, at least the white letter versions were.
As you can see in the factory photo-
Take a look at these for the contours of the rear quarter panel-

Notice the separate panel that formed the Kamm tail add on and the trunk line.
Anyway, NICE WORK and a killer subject!!!

(I LOVE CARS!)