Bought my 90 gt last fall, it was someones project, and we all know about buying someones project!!Long story short, after changing just about every thing prev. owner had done I think ive got it right now. My question is this. the car had a bad high speed vibration I got a alum driveshaft and vibration is gone but the car is lowered ( very low ) do I need to buy adjustable uper ctrl. arms to set pinion angle or will it be ok? dont want to damage the u joints on the new shaft. want to get it right befor I go to the track for its first pass thanks for any info.