There are some different aftermarked dual intakes available for the 235 Ci staright six cyl. engines. To mention some of those used most are Offenhauser,Fenton, Tattersfield ect. For 235 CI ; Offenhauser intake measures ; The carburetor port diameters are 1.700 in. Carb studs 2-15/16 on center The intake port diameters are 1.550 in. For 235 CI; Fenton measure; Carb studs 2-15/16 on senter. This intake will use (2) of the bigger base carbs typical of 54-62 Chevys. Carb brands that are used are ; Stromberg,Holley,Rochester,Carter,Zenith Question; I would like to know wich carb model and brand will fit directly on the intake (carb studs have 2.15/2.16 on senter) and give the best performance/power? Tell us your experiences, thank you Martinius.