Holley Ultra Double Pumper Model 4150 650 CFM4-Barrel Carburetor - 4-Barrel - Square Bore - Electric Choke - Vacuum Secondary - Dual Inlet - Gold Chromate 7-3/8 QA1's Aluminum Shock Extensions can

QA1's Aluminum Shock Extensions can give you a little more length if needed for your application

The MSD Digital 6 Plus uses a high-speed RISC microcontroller to control the ignition's output while constantly analyzing the various inputs such as supply voltage

1966-1968 Mercury Montclair

No Modifications: Install

Holley Ultra Double Pumper Model 4150 650 CFM4-Barrel Carburetor - 4-Barrel - Square Bore - Electric Choke - Vacuum Secondary - Dual Inlet - Gold Chromate 7-3/8 QA1's Aluminum Shock Extensions canNOTE: Due to the natural color variations of the dichromate plating process, the plating color may vary from casting to casting (within a carburetor) and from carburetor to carburetor. This is considered normal and is not a cosmetic defect. If you desire a carburetor with no color variation, please shop our black and shiny finish carburetors. Performance upgrade for stock to mildly modified vehicles Universal calibration for easy bolt on performance