I would measure for driveshaft length just to be sure. After you have the rear in with the cars weight on the tires so you achieve ride height, measure from the end of the tail stock (not the shaft)to the flat surface where you're u joint clips bolt on. That will give you the length. If you need to shorten it take it to a reputable shop and have them shorten it and balance. You may also want to call your local shop and ask them how they want you to measure. If there's a minimal difference then you might be ok.