1989 chevy blazer 1/2 ton axles 350/350/208 just helped put a lift on and this is what it came too...

6'' front superlift springs
shocks, brake lines etc...

4'' shackle flip with 2'' blocks REAR
shocks brake line etc...

1'' transmission crossmember drop.

All looks great and pinion angle is to what i would say damn near perfect and everything runs and drives great except at 45 mph gets a good vibe and the slip yoke barely i mean BARELY came out from stock location..

Motors been running rough but he said at 45 on gas gets a vibe lets it coast no vibes.. no vibes between 0 and 45 and no vibes from 50 and up..Truck sits on BRAND NEW 35'' bfg allterrains and its his camping hunting daily driver...any ideas whats causing the slight vibes??? Im guessing at u-joints..Ill try to get pics of driveline angle tomorrow.