Unless you're going to do some all out drag racing, go with the Demon. But if this is your daily driver then stick with the Holley. I seen guys at the strip put in a Demon, run a few test runs and end up taking it back off and running their Holleys. Unless you really have one heck of a motor stay with the Holley. The Holley double-pumpers are a big gain over the Holley vacuum secondary carbs even though the cfm's are the same. Been there, done that. Have fun.
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