At 70mph the truck vibrates like one entire side of my rims is packed full of mud...everytime i hit a bump it shakes like the wheels are going to rip off....this is felt in the steering wheel, seat, floor, ENTIRE truck. If i go say 80mph its fairly smooth and even if i go 60mph its not TO TO bad but the bumps still shake everything to hell? whats going on? Its a stock suspension truck so i shouldnt have to worry about the driveshaft angles.

 

Just a thought but it could be your carrier bearing even though your angles are stock.