RE: Brake problem!
For a bench bleed while it's still on the truck, merely disconnect the lines, and jack the back of the truck UP till the top surface of the brake fluid resevoir(at the top of the master cylinder) is perfectly level. Then follow bench-bleeding instructions. Then re-attach the lines and bleed the brakes normally, after you jack it down. Worst come to worst, take it to someone who has a powerbleeder to get that air out of the lines.
You'll know without a doubt(better have that seat belt on) when you get the air out!