You did an excellent job! Since you asked for constructive criticism, I think the plug wires should be more red than orange. Also, the fiberglass intake trumpets are a little too monochromatic. If you look at images of the real thing, they always look like they have had a brown wash applied to them. I think the real car had small lights for the roundels on the doors and the rear deck lid too.
Those decals must be fun to apply!
I wouldn't worry about the fit of the rear body work as it was a terrible fit on the real ones too!