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<blockquote data-quote="Mad Professor" data-source="post: 3220739" data-attributes="member: 5316"><p>Not sure what rules you were under. But most rules would not allow any polishing as it was the easiest way to cover up port work. Some would allow you to go so far above the valve seat to allow blending. </p><p></p><p>The heads I had were off a Champ Sprint. We ran them a couple of years before we were allowed to move to Aluminum heads. Then back to Steel, then Aluminum again (but a spec head)</p></blockquote><p></p>
[QUOTE="Mad Professor, post: 3220739, member: 5316"] Not sure what rules you were under. But most rules would not allow any polishing as it was the easiest way to cover up port work. Some would allow you to go so far above the valve seat to allow blending. The heads I had were off a Champ Sprint. We ran them a couple of years before we were allowed to move to Aluminum heads. Then back to Steel, then Aluminum again (but a spec head) [/QUOTE]
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