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I am in the process of getting my '72 Nova going again. I was not happy with the way it idled and ran before with a 750 Edelbrock carb. I am looking at going with a 750 Holley this time around. Since the car has a healthy 408 sb and an Th350 trans I will be going with a vacuum secondary carb. Any feedback on which might be better would be appreciated. I also want the simplest carb to adjust and maintain.
 

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If you want vacuum secondary that is the 4160. The 4150 is the mechanical. I always had good luck with the old 3310 750.
 

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After owning a few vacuum carburetors I just don't see it any more. I've never seen a comparison where the mechanical didn't out perform the vacuum carburetor. I'd highly advise going non vacuum double pumper if originality wasn't wanted.
 
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