Rancheros and El Caminos can run in the same class as Tourinos and Chevelles. No prob. They already have a very nice class to run in. This comes up every year or two. A pure case of not thinking things through IMHO
I'm not good at reading between the lines, but I "think", the debate is about some kind of rule change coming up that would explicitly permit car-chassis pickups to run in mini-truck. And the question seems to be that if a Honda, Toyota, Subaru, Volkswagen, EuroFord, Holden, cartruck is permitted to run in mini, why would only American cartrucks be excluded? If a Subaru cartruck is a mini, it would seem that so is a '64 Ranchero (Falcon?), or a '64 El Camino (ChevyII?). They would fit the description, and they are much larger than import cartrucks are. Yes, the Elky's can run in coupe, but so can the imported cartrucks I suppose.
I could be wildly wrong though, and I have no dog in the hunt. xDT classes already permit minitrucks.