CC Outtake: Now That’s a Truck!

I spotted this one day awhile ago and had to stop and talk to the owner. According to him it’s a 1972 model. But I can’t see how that is possible given it’s R series cab. He also told me it had a large gasoline V8 engine. I can’t remember what it’s exact displacement was but it was over five hundred cubic inches.

It has a five speed transmission with a Brownie axillary that is no longer able to downshift. It’s his primary drill rig and has seen a lot of work over the years. But it sure sounds like a pain to drive! Kudos to you if you can tell me the exact displacement of the engine and the model nomenclature of this truck.