PAC 1521 springs!!!
Both Shawn and Richard checked the springs that I've been running for the past 6-7k miles - PAC 1521's. These are nitrited for longer life and I believe it. The springs checked out within 5 lbs. of their new specs. Pretty amazing running with .660 lift. Needless to day, they're still in the heads. They are expensive but worth it.
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