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Old 07-24-2012, 04:39 PM
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Richiehd Richiehd is offline
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If its got the original style heads on it, you will want to use short thread 13/16 style spark plug. Not sure of the number A/C 45R maybe. Open the gap up from .035 to .045 to take advantage of the HEI. Then you can bump the timing up some to get more power.
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