Thanks for all the info,
Sounds like the vibration is most likely coming from the Crap-O (BIG-O) tires.
Since the post I rotated my tires and noticed the vibration is a little better. Possibly one of the front tires was out of whack and is now on the rear of the truck where it causes less vibration.
I may get those checked out soon with the road force equipment.
Shedman, let me know what happens when you get new tires, and I'll do the same.

Thanks,
Vern