Thread: Holley 4555 stock jet sizes
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Old 05-18-2005, 03:59 AM
Seattle Sam Seattle Sam is offline
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Default Re: LS6 L78 4557 jets??
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I don't know about '70 but our '69 COPO Chevelle came with #68 jets in the primaries and #76 in the secondaries. There was noticeable lean surge at 60 mph.

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Thanks Keith! Would these be the same jets for the '70 L78 and LS6? Mr70, or anyone?
-Sam
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