Outstanding build, Tulio.
However, in the spirit of your advice ("Only mentioned so you could fix it before taking the model to a show or something, and have a judge taking points from you because of that. When it's something on a factory stock car, and I'm positive the detail is wrong I try to warn the builder to fix it."):
You should not leave the big, glaring ejector pin marks on the undersides of the running boards. It doesn't take much effort to remove them but it makes the undercarriage look much better. I realize you didn't put much effort into the chassis and drivetrain, but the ejector marks spoil the beauty of your model overall.
And, in my own personal opinion, I've always felt flatheads (and Hemis) look just plain wrong without spark plug wiring. Simple, easy touch to make the model look soooo much better. Just a couple of thoughts.