I have always been a die-hard Holley man. I have never owned a Demon myself, but I know several people who do, and I've checked them out pretty thoroughly. They are a very well built carb. The Avenger doesn't have anything the Demon doesn't have, but the Demon has better quality parts (including dog-leg boosters, sight plugs that don't haze over, and billet metering blocks and baseplates). I'd go for the Demon.
Take care
~Chris
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MustangNet
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RACECAR spelled backwards is RACECAR
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