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i do have it on a 4bbl intake though but i know someone else who has a 2bbl on a 4bbl intake and has no problem with it.

Correct, thats not it. I remember I had a carter 2bbl on a 318 & it had that exact same 1/2 second hesitation & it was that I has slightly tore the acelerator pump neoprene cup during an install

live every 24 hour block of time like it's your last day on earth