I have searched and read the **** and tech articles.

but my OCD needs confirmation from a few people

Can I expect near perfection by replacing my old tired thirdgen steel driveshaft (virbates at 80mph), for a junkyard aluminum one off a 4th gen?

And please confirm that I do not need to do anything strange, that all i need is 2 new u-joints (mine are bad) for the 3rd gen, and the new 4th gen driveshaft. Then bolt up and drive away.

Please confirm asap, i got a race friday

 

really

the 4th gen axle is a direct bolt in. It will generally eliminate the vibrations, unless its caused by something else.

 

If you already know your u-joints are already bad, replace them. They may be the sole cause of your vibration. If not, your vibes won't go away, even with new ones on your current driveshaft.