I am fairly sure that one of the after market suspension company is just using springs you can buy anywhere and cutting coils out of them to increase the spring rate and lower the front of the car. Those springs are made for the weight of a Chevy engine, not a Pontiac engine. A Pontiac engine weighs in between a small block Chevy and a big block. I know they use 2 different springs, one is 14 inches tall and the other is 15 inches tall.
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