[HWYSTR455]

Yeah, chances are pretty slim the angles would be right, have to understand that with a longer trans, and a shorter driveshaft, the angle change.

Shims are available, and pre-cut to fit, several people make them, and are inexpensive. But as others pointed out, you have limited room to make any big adjustments.

Adjustable uppers is probably the best approach, but it may, and probably will take a combo of adjustments to get it acceptable.

Keep in mind too that driveshaft diameter and material impacts driveline 'harmonics'. If it still has vibration after the angle are in an acceptable range, you may have to switch to a different diameter/material driveshaft.

Another factor often overlooked is that the pinion angle is actually a 'range', because it changes with suspension travel. You may for example cruising on the highway at a particular RPM find that it vibrates, even if you at rest have acceptable angles. Choosing something more 'in the middle' of the range may or may not correct that. You might have to actually go outside of an acceptable range at rest to get the optimum in-use results.

The car will settle some too, and since it's a new build, you may have to check it a couple times in the first like 5-10k of miles.

Tremec has a phone app for smart phones to check driveline angles, it's not bad, and I have used it a number of times.

http://www.tremec.com/menu/tremec-toolbox-app/

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