1971 C-20 Questions

[independentcustoms]

I just bought a 71 C-20 Camper Special, and I'm looking for some info on it. I haven't gotten it into the shop yet, I don't pick it up til this coming Saturday. What I'd like to know is what makes the camper special different from the standard 3/4 ton? As of right now, here's what I do know:it was originally a 400cid(has a 305 now) motor, and supposedly a th350 trans. I don't know for sure if that's what the trans was from the factory, I know it has one now. There's a cord running into the bed that was supposedly to run camper lighting. It has what appears to be a factory electric brake controller. I took a very quick look under the back end, and I see that it's still a coil sprung rear, but has an addition of a leaf spring behind the axle (not a full leaf, but some sort of helper leaf). It has power brakes, but that may have come standard on all trucks that year, I don't know.

Anyway, if anyone can give me some info, I'd greatly appreciate it. Are the springs different from a standard 3/4, brakes, etc?