From what i understand a triangulated four link is a better all around rear. Handles and launches good. A parallel four link like the Quadra-link is better for handling but doesn't launch as well. The frame rails are VERY thin. When i mini-tubbed my car and the frame rails were open i couldn't believe how skimpy they were. I know Art Morrison makes you use newer, thicker, stronger frame rails for this reason. The quadra-link has an extremely thick upper shock crossmember, and even with the frame rails cut away, the back half of the car feels so much stronger than before. In the end it boils down to what you want to do with the car, and how much cutting you are willing to do.
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Ken
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