Maybe so, but to counter that point, there were LOTS of big slide in bed campers out at that time. They were the rage through the 1970s. Ford kinda cornered that market, too. Although the other two made Camper Specials, nobody made as many as Ford and nobody made anything that could compete towing and hauling wise. You ever heard of a Ford "Super Camper Special? They were F350s whose rear axles were moved back 7" to increase weight capacity. No other auto maker offered such that I've ever seen. I love those trucks. Always wanted one. They look like a big bulldog. Here's a really RARE 4WD. Look how far back the rear axle is.
View attachment 1716333178 That's a badass truck.