Hy IHBoilermaker, after checking my parts book, it sounds like you have the 5/10 stud Kelsey hub piloted wheels on your truck. Each wheel has ten stud holes on an 8.75" bolt circle, the wheels when used on the front axle only use five studs/nuts there were cover plates for the front wheels that would hide the fact that you were only using five of the ten holes in the wheel. I have tried to verify about the cover plate on your year of truck, but so far I have not come up with a part number for the cover plate, hope that helps.
