A nice touch of memorabilia, mvetrano2. Let's not harbor any illusions though, shall we? According to Wikipedia (and other sources), "According to former cast member Ben Jones ("Cooter" in the show), as well as builders involved with the show, 325 General Lees were used to film the series. Others claim about 255 were used in the series. Approximately 17 originals still exist, although in various states of repair. On average, more than one General Lee was used up per show."

Still, it's an icon, albeit one that has drawn the ire of the current crop of offendenistas.

The professionals who told you that are idiots. Full frame lenses will work fine on a crop sensor camera and your two current lenses are superior to any crop 18-300 zoom. In fact sticking a crop 18-300 zoom on a D500 would be a step backwards. What these "experts" were referring to was that FF lenses on a crop camera are much bigger, heavier and much more expensive than lenses specifically designed for a crop cameras, and since you are using a crop sensor you are not taking full advantage of the lens' entire image circle. This is all true. However, for you the advantage is that that you will likely see less vignetting, less distortion, and greater sharpness across the frame with your current lenses. Unless you have a good reason to get rid of them, other than the musings of experts, I would keep them.