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Old 01-29-2009, 09:22 PM
WDCreech's Avatar
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As turbo67bird said, the 72 cc cumbustion chamber would make too much compression, on a 455, to run on the best pump gas. The 6X-4, or something comparable, would be about ideal. Here's a chart for you to look at different head options: http://www.wallaceracing.com/headsearch.htm

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