too much carb can have an adverse effect on the piston ring seal and fuel delution of the oil
i put 750s on 454 BBC motors with 9-1/2 compression and a small cam it makes it a neck snaper but than again its a street car for the most part you are doing - and bigger has some advantage in seat tuning only not for the long haul my choice for a carb would be a 600 top on an 850 bottom makes it work un real hard and has the WOT flow of good MPH in the traps - jz
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