Buy some airbags for your truck, I suspect that will be a problem in the future. Cheap insurance on keeping it level - I would recommend getting the bags with the built in compressor, you can adjust on the fly. You can buy a brake bleeding kit, or manually pump the master cylinder with someone releasing the pressure or you can get all redneck and block the rear tires and gently rock back and forth with your truck/tow vehicle (apply your brakes to hold the pressure) while releasing pressure (if no one is around to help). I don't really recommend the last one