I have fixed my problem with the vibrations. I put an super lift trans drop kit for the front vibs and a carrier drop for the rear all seems to be good now.

 

Could you post part numbers/costs? Thanks...I've the same problem.

 

Get yourself an angle finder. I know that sears sells them. They are a big round gauge divided up in 90 degree segments. Then just measure your yoke angles. Remember to measure on top of the pinion yoke and on bottom of the transmission yoke, or visa versa. Your pinion yoke can be about 3 degrees less than the transmission yoke, pointing farther down, because during driving torque will move the pinion up slightly and make up for this difference. If you are looking at dropping your t case/transmission just use some steel flat bar. I ended up using 5/8X2 flat and installed new bolts for a 4 inch lift on my 84 ramcharger.

 

Carrier drop was about 50 bucks part # 4667 and the trans drop part # 55-12-4660 not sure of the cost I got it from a friend.

 

I think the idea of the steel plate for the carrier drop is a good idea. I think that the drop I ended up getting was about 1-1/2 to 2 drop.

 

I'd like to lift my truck, it'd look so nice, but my truck is so mild mannered over 100mph right now. lol