Does anyone know the specs for testing valve springs that have been removed from a set of Pontiac 6X-4 double-spring heads? I'd like to test my used springs first befoe deciding to purchase a new set of springs. I've already checked the straigtness of the springs against a carpenter's square and all of the springs are within a 1/16". I have a 300lb spring tester that I can use to test the springs, but am not sure of the height and spring tension that I should be checking. Any help would be appreciated. Also, I am using a Crane Cam with the 068 grind for my motor.
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