Valve springs
Lead Driver
Joined: Mar 2004
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A good guess would be no more than 120 lbs seat psi with the recomended spring. Without cutting the heads for spring seats it can be limited what you can do for seat psi. You could probably get away with as little as 90 pounds if you had to.
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flat6inline
Y-Block V8 (239, 272, 292, 312, 317, 341, 368)
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Mar 22, 2008 05:25 PM
