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Muscle Car Tech Tips Rocker Arm Clearance Guide

Always check for lift capacity when changing cams. Generally, more lift with stock-type heads can cause problems between the retainer and the top of the valve guide where the seal sits.
Muscle Car Tech Tips - What's Your Problem?

 Always check for lift capacity when changing cams. Generally, more lift with stock-type heads can cause problems between the retainer and the top of the valve guide where the seal sits.  View Related Article