Horsepower

A factory 2 barrel engine has less compression, less cam and of course less carburetor. (ignition too) It was rated at 180 horse and I bet it put out around 150 or so. A 4 barrel intake, carb and duals might get you to the 180 but without more compression and a bigger cam no way you could get to the 235 horse the 4 barrel engine supposedly had.