Carburetors are rather complex, yet easily fixable devices put on engines with the purpose of blending air and fuel in the proper ratio for combustion to happen in the cylinder(s). Before the days of fuel injection, carburetors are what made engines work.
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When it comes to the Holley 4346, we're talking about a lot of fuel and oxygen fed into V8s though four-barrels. This high-performance unit originally came in the 1969 Chevrolet Camaro Z/28 and Chevelle, both with the 396-cubic-inch engine. That motor produced 375 horsepower, partly thanks to this 780 cubic feet per minute (CFM) dual-vacuum-secondary carb.
But like all complex parts soaked in oil and baked at high temperatures for years, carburetors need some attention as well from time to time. Check out this video from classic-car insurance company Hagerty to see what goes into rebuilding a carb.
Clearly, this rebuild isn't Hagerty mechanic Davin Reckow's first rodeo with this magical device.