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From: Portsmouth Virginia 396LT4 435RWHP/400RWTQ Best so far 11.26 @ 123mph
I run the single adjustable QA1s front and back.They work very well for street/strip use. I did have to make new rear lower metal bushings that go thru the rubber shock bushing though to get them to fit the factory stud post diameter correctly due to too much clearance.Don't know if that is an issue for others but it was on mine.
Rick