after doing some research, it is because the groove in the exhaust valve is lower than the groove on the intake valves. Valves are stock valves. Install height now is 1.99" (top of the head where spring sits, to the top of the spring/bottom of retainer) I "believe" they call for an installed height of 1.94" therefor requiring that the spring come down another .o50" which would give me the room I need on the rockers....I "think"
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And God created Neil Peart so that lightning would make sense to the world.
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