Used shims on axle and plate on trans tail shaft that came with kit for proper pinion/driveshaft alignment, ( I thought) after playing around with it this weekend I found the trans needed to be raised just about 1/32 of an inch added a homemade shim to raise tail shaft. Like magic vibration all gone. I am going to play with it some more to see if I can get same result by changing shims around/out and spacer plate at trans.
FYI everything I found told me angle of pinion is between 3 and 6 degrees
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