The Corvette 3-carb setup on the 235's only managed to gain 20-25 HP over the single carb engine, and it also used a more radical camshaft profile and 1/2 ratio higher compression. To get that HP gain, the top end speed went up a whole 200 RPM, from 4,000 to 4,200. The hottest Corvette 6 was the 1955 model, with 155 HP @ 4200 RPM, compared to the Powerglide-equipped passenger car engine at 136 HP, also rated at 4200. Earlier stovebolt 235's ran anywhere from 115 HP to 125 HP with a single Rochester 1-BBL carb. The slight increase in RPM underscores the problem with multi-carb/dual exhaust systems- - - -the cylinder head can't breathe well enough to take advantage of the extra CFM available.
Equipping a 235 with the extremely scarce and expensive OEM 3-carb, dual exhaust system these days would cost several thousand dollars, with only a modest power boost. Then there's the problem with even making that setup fit on a truck- - - -there's just no room for it!
Jerry
