Could you please tell me if the Holley carb in these photos has mechanical or vacuum secondaries? I don't know much about these things. No time like the present to learn, Arron. If, as per your photos ...

Due to changes in emissions laws, carb idle solenoids were used on all '69 (M-code) 440-6bbls, all '70-'71 6bbl engines (including the 340 T/A-AAR packages), '70-'71 Hemi engines, and '70-'71 ...

Because the Autolite 4300, an emissions carburetor, quickly proved unpopular when it replaced the 4100 in 1967, many were replaced by Holley carburetors with their improved performance and solid ...