buddy of mine has a 4640 AVS and i think its got the bigger primarys on it. is this swap worth the cost of the carb and rebuild? the 383 is stock with slight manifold plenum and gasket match, 1/2 4-hole spacer, 915 close chamber heads stock valves, 9.75 cr, stock bottom end, small vodoo cam 220/226 @.050, stock HP exh manifolds with 2.5" x pipe exhaust, 3.23 gear, 4-speed. in a RR. the car does seem to run out of breath over 5,400 rpm. Is this carb the 750 cfm large primary carb? whats a fair price for one. Thanks
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