to really check a/f you need a wide band style sensor.you can lean and richen the cruise and low speed circuits by changinging the air bleeds next to the ventris.I know the oriiginal BG had air bleeds that were removable,also you can drill out the power valve jets[for wot a/f].in the holley they are at 9 and 3,but be careful when drilling you can remove metal but not replace it.cruise should be 14.7 or there abouts and power should b e 12.8-13 depending on c/r and timing curve.Stan
Last edited by Ruslow; 07-29-2011 at 07:14 PM.
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