Goodwrench Quest, Part III
All late-model engines now use self-aligning rocker arms, which are identified by the “rails” or ribs on the stock stamped rockers that are used to keep them centered over the valve tip since no guideplates are used. Comp Cams offers rail-style Magnum roller-tipped rocker arms that are a direct replacement. We tried increasing the rocker ratio to 1.6:1 in this configuration, with no improvement.
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