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Originally Posted by Woodz428
They are good carbs, but a small correction, they were never any bigger than about 465CFM. That's one of the reasons they were always changed out.Holley made a 4010 a few years ago that was an updated model of that carb, it came in 750 CFM and maybe one bigger, they're unfortunately no longer made.
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Wood428, there are two versions of the Autolite 4100 carb. The first is the 465CFM and the other is a 600CFM. The latter looks the same with slightly larger butterflies and venturies...and they are hard to find. I don't have my book with me otherwise I would give you casting and air horn numbers for the two differing carbs.