I've built several of the C10s of that era with various drivetrains!! Most were fun to drive and all but one rode and drove like late model trucks. That one had military 4X4 axles/suspension.
The most fun to drive was a short bed fleet side with a turbo 400 transmission and one of those bent, eight cylinder, tall deck, wide engines. It would burn the tires off, leave black streaks 200ft. long, and you needed the entire bed area to hold the tickets it would attract.
I'd like to have one of the 3/4 ton versions!! No telling WHAT I might get into!!