Had my driveshaft balanced, some new U joints installed and had the bushing in the tailshaft housing replaced as well. Just got it all back in the car and also put my lowering blocks back in because it was sitting a little high in back for my liking since I installed the new leafs. Didn't get a chance to take her out for a spin yet. Will do it tomorrow. Hopefully I have eradicated the gremlins that were causing my vibration issues. If not, a new set of axles and bearings will be the next purchase.
I tried to find my original thread about it but I never can figure out the search function on here.