Why would it be a waste of money?
First of all, it´s adjustable so that You can adjust the pinion angle. That´s very handy when it come to racing.
Second, it got the driveshaftloop, which is a must for a dragracer.
Vibrations? I don´t care. If You want a car that You don´t even know it´s running, You´d probobly look into something else than a musclecar.
These are atleast my opinions.
/Andreas