Welcome Jimmy. Those camper trucks are good to save. Likely some extra options on that truck. We need pictures.

We will see what the engine experts have to say, but it sounds like you are hitting the right chords.
Confirm you cleaned the small filter in the input to the carb. My first thought is fuel, but if you cleaned and checked the tank, lines and carb then we shortly can check that off the list.

~ HB
1966 Chevrolet K-10 | Ghost: formerly Flappy Fenders | In the Stovebolt Gallery
1962 Chevrolet C10
1962 Suburban