When I think of truly great concept car designs, my mind immediately goes to sports cars. But the concept car universe is a wide one, and although it's rarer, pickup truck concepts can push the envelope too. The best example of this might be this amazing Dodge concept from 1967.
If you've played with Hot Wheels cars in the last forty years, you've seen the Dodge Deora concept. It was a one-off custom A100 Cabover concept loaded with far-out style. Now it's going to auction in real life.