.....I've accepted that my drum brakes will catch on fire if I attempt to stop....
Please post a pic of your truck so we know to stay out of your way. I would seriously upgrade your brakes.
if your truck is bouncy, that is a dampening issue, stiffening the spring rate will only make it that much worse. you need progressively wound coil springs - that way, you get a good ride unloaded, and they only set a small bit when loaded.