I hear ya on the pinion angle thing, I was wonderin if anyone in toyota land has heard of the superlift 5" lift spring packs giving this kind of vibration on short bed trucks like mine?? If it is a known common problem, whats the common general fix for it?

There are known driveshaft vibration problems with known vehicles with certain lifts. For example jeep TJ's or Older Chevy blazers with greater than 4" lifts on them. some go CV joints on rear driveshaft.

88 red shortbed 5" superlift, 35 BFG M/T, 5.29's, detroit r, welded f, LCE EFI pro power package, electric fan, battery in bed, owned since new, 73,000 miles now.
2003 Dodge Ram Hemi 1500 Q/C 4x4, 315 A/T BFG's