We grouped pre-88 trucks as vintage eventhough they can still be considered 1st gen. really. I think prior to '82, Dodge pickups didn't use the RAM designation, rather they used terms like Adventurer, Utiline, Power Wagon, etc.
Kinda like in '82 when Dodge started badging passenger vans as Ram Wagons rather than Sportsman Wagons and work vans as Ram Vans rather than Tradesman Vans.
61-71 Dodge pickups were part of the "Sweptline" era.