Who the heck are these guys?

[Bullett]

O.k., tinkering on my "new" 62' c10, changing a few things to what I like. Even though the picture on the tailgate is very tastefully done, I just didn't want anything like that on my tailgate.
After studying it for a while, I realized that it was a decal instead of an airbrush mural painted on. I grab my heat gun and heat it up and start peeling it off. I was pretty happy that I was going to have an all blue tailgate. As I start peeling, I start seeing another mural underneath the decal. This one was painted on and was actually a beautiful piece of work. I called my wife out and we got to really looking at the mural and neither one of us have a clue who the 2 dudes are and what the mural depicts. It is so beautifully done, I really hate to paint over it. Anyone got any idea what it is all about?