Works for me... and my buddy with a '70GTO who drags ALOT, swears by them and they also improved the ride of the vehicle, too.
Hope it helps.
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Julie
'71 Chevelle
http://www.geocities.com/MotorCity/Boulevard/7827

Hope it helps.
------------------
Julie
'71 Chevelle
http://www.geocities.com/MotorCity/Boulevard/7827