would i just be wasting my money?

i just got new wheels and tires yesterday (finally) the tires were dry rotted to hell and i noticed a huge difference in higher speed, less vibration. now i think i just need a better DS. check out the link

http://sandiego.craigslist.org/csd/pts/799518811.html

ive read here that a better alum or even better balanced DS could be a solution to less vibration. so im on that quest.

thanks in advance

 

You would be better off buying a 3rd/4th gen aluminum dr shaft ($100/150). Tires replacement do not require a dr shaft replacement unless you experience a high speed vibration.