There's not much difference between 3/4 and 1 ton drivetrain, even today. It's basically springs, and sometimes brakes. The frame is still reasonably light in comparison to a medium duty truck rated to comfortably handle the loads you describe. I suspect the 82 frame is also less substantial than the equivalent frame today.
Before jumping in with a particular donor chassis and then upgrading this and that, look and see if there's an ever better donor with fewer required upgrades.
For example you're looking at a 1 ton with a 14 bolt rear and adding disc brakes, but a new AAM axle, the replacement for the 14 bolt comes with disc brakes. So the AAM axle, or the whole newer truck, may be the better option. Also consider that "disc brakes" aren't all equal. A Crosley car came with disc brakes, but they're hardly suitable for a 1 ton truck. I believe that the readily available kits for adding "disc brakes" to a 14 bolt are based on old 3/4 ton front components, they don't look that special to me. If you're still into adding disc to a 14 bolt there's some info a few post down in this link on adding the later model, larger, AAM disc brakes.
https://www.stovebolt.com/ubbthread.../14-bolt-axle-swap-info.html#Post1249600Back to upgrading axles, take a look at this truck I didn't build, but I did swap axles.
https://goo.gl/photos/5fvttZyaSsDGudw4AThe original axles, gears, and brakes weren't up to the engine and transmission's capability (swapped in decades ago). I wanted better gear ratio, taller tires, and serious brakes, which I found with axles from an, at the time, new model Freightliner medium duty truck rear axle and a TopKick front axle. I don't recall the rotor diameter and thickness but they were way larger than any pickup truck, and had massive calipers.
The whole thing when done was much better, but then look at the frame it's now quite spindly in comparison to the rest of the truck... Ended up being more drivetrain altogether than the frame was good for.
In my opinion, you're asking more than an old 1 ton should be asked to do, even if it could. A medium duty chassis would be a better fit capacity wise. Some have used import cab over trucks as donors, that's worth a look and they can be narrower which is a help.
Otherwise if you're stuck with old GM sort of 1 ton stuff.... look a little larger at the P30 (and similar modles) and the 3500HD all with the 10 lug pattern on 7.25" bolt circle, these trucks come with hefty disc brakes front and rear. My 2 ton has axles under it from these chassis, and original frame, which is also well worth considering.
