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O,
The procedure I describe is adjustment of the float level using the needle and seat assemblies. If the gent sets a static float level with the carb on a bench, you'll still need to adjust the level on the car, while running.
If you have a "blue" Holley pump you do need a regulator set to 7 or 7 1/2 lbs.
If you have a "red" pump you need no regulator, it's already a 7 lb. output. The other is 15 lbs if un-regulated.
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Chas.
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