1991 Pontiac Firebird Formula - Dyno Diagnosis, TPI Style
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Another rocker-arm requirement when dealing with center-bolt valve covers, as used on most '87-and-later Chevy small-blocks, is the special rockers needed to clear the stanchions for the valve-cover bolts. Even with Comp's Pro Magnum rockers, the stanchions have to be trimmed. View Related Article
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