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post #1 of (permalink) Old 07-07-2007, 11:45 AM Thread Starter
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Engine/Carb Tune

258, non-stepper motor BBD, Duraspark. Let me see if I got this straight.......Warm up engine. Remove and plug vacuum line from distributor. Set timing. Reconnect vacuum advance line. Set rpm. Adjust each idle mixture screw, within 1/4 turn of each other, for highest vacuum. Back off 1 inch for best emissions. Or screw in-make lean for a 50 rpm drop. Readjust idle. ????????? Yes? No?

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