1973 Other GMC Models carb

1973 GMC
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FRANKAPPLEGATE
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Engine Performance problem
1973 Other GMC Models V8 Two Wheel Drive Automatic

what is the idle turn out supposed to be at on a holley 4 barrel? its a gmc sprint with a 350
May 7, 2009 at 8:43 PM
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HMAC300
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i am guessing you are talking about the fuel/air mix on this. lightly seat them then turn out 1 and 1/2 turns. then put a tach on the car and get your highest rpm adjustment. then adjust your idle to specs.
Oct 10, 2009 at 9:22 AM
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