Re: Drive line and rear end shim questions
You will need to get a angle finder and check all of the angles of the drive shafts, the transmission yoke and the rear end pinion. Doing this will allow you to make the right adjustments to get a vibration free drivetrain. Just adding shims blindly may make your problem worse. There are numerous threads on this. Here is one with an external link and a links to my own drivetrain setup. I hope this helps.
http://67-72chevytrucks.com/vboard/s...u+joint+angles
http://67-72chevytrucks.com/vboard/s...698377&page=14
http://67-72chevytrucks.com/vboard/s...698377&page=13
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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