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Brent,
Thank you for the kind offer. At this point I will go a different direction.
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I visited the local Holley expert (Promax) and had a long discussion and shop visit. He uses test mule engines on a dyno to get basic tune on carbs and then experience to final tune. He is confident my carb can be made to work well.
Starting from square 1 he would have suggested a 750 double pumper. His opinion is that with about $175 in tuning work my carb will be very close in performance to a 750 double pumper.
I am going to give him a shot.
He says the 850 would not be as responsive for a street car, and the 750 does give up some max HP.
John
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