drop the primary jetting one and add one to the 2ndary. I ran 74/86's in my S/C'd 440. Pretty much the same engine you have. Very mild 440 w/ 6psi of boost. No idea of my readings all I had was the cheapo A/F gague w/ the red yellow yellow green yellow yellow red lights. stayed in the green to 1st yellow al the time.


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Coming soon!!!!