A Sherlock Holmes needed to ID 340 springs - Aftermarket

70aarcuda said

P3412028 is a dual spring with a damper..good to lift up to .620
p3614542 is a dual spring with a damper.

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Yes, but.

You can utilize those 'above' Valve Springs w/Damper {less 'Inner' Valve Spring}
in a Mild-to-Medium Lift Camshaft.

Check the Load-Rate Pressure.