Not Ranked
Hey Rick,
550-600lb is enough for a Mack truck. There is no need to go over 300lb spring on an ERA with a big block for either street or strip. (Unless you wish to bounce around a corner) Eibach purple 12X250lb and the Spax shocks will perform great. I like the adjustment on the Spax and have tried Koni's and Aldens...I now run the Spax.
Enginetime
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