There was Ranchero, actually before El Camino. This was no new concept, either. Heck, a sedan adapted to a pickup preceded the pickup. That's where the idea came from... Bing! There have been Utes all along, conversion kits to one-off custom. Many look darn good too! So here's to those... those...... things that have a bed you can drive like a car.
EDIT: Looking in my picture folders I realized this could be about any "Car Based" vehicles. Any year, any make, any type of alteration type conversion. Think campers to utility to...?
This was in my "El Camino,etc" sub-folder as Cadillac. I'm not sure now, but I think it's factory-built.
Nash. I believe factory:
GMC Sprint is a dream of mine: