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Old 09-19-2012, 09:24 PM
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whats you vacuum lookin like? power valve may need to be a 4.5 instead of the 6. also if you are rich while driving switch to smaller jets. or larger high speed air bleeds. jets first. get the afr right then tinker with the timing. you can get about 40hp in timing, seen it many times. i have a 355 with a thumpr cam and 78 primary jets and 80 in the rear makes a slight lean condition on the dyno at wot. no lean pop while driving normal tho. just a thought
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