273 mech rocker problem

Grinding on any rockers is not a good thing at all. It's an indication the rocker shaft needs relocating. Mike at @B3RE can help you. After speaking with him and letting him fix me up with a rocker shaft relocation kit, there's no way in hell I'd ever grind on any rocker arm. It's not the correct way to do it, I don't care how long who has been doing it. Call Mike. He will help you out.
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