Is your old 650, 750, or 780 vacuum secondary main body busted or too grimy to deal with? Rather than throw your old trusted Holley away, replace the main body assembly and breathe new life into it. Or use as the core of a new build. Includes vent tubes, squirters, nozzle screw, base gasket and mounting screws. 134-333. Manufactured in Bowling Green, Kentucky.

This is the main body used in Holley's 0-3310S Classic 750 4160 carburetor. It can also be set up as a 4150 carb that uses a secondary metering block with changeable main jets for further adjustability. A 4160 has a secondary metering plate with fixed jets. There is a secondary power valve cavity but the feed hole is not drilled fully through; the pilot hole can easily be finished with a drill for those who like to use a secondary power valve (which would require a 4150 setup). Like the tried and true 3310s of old, this is not a four-corner idle style main body.

FEATURES:

• For 650, 750, and 780 1-11/16 bore carburetors.
• Lightweight aluminum.
• Choke plate and rod installed. Can be removed if foregoing a choke.

SPECS:

Primary Venturi: 1.38 (1-3/8)
Secondary Venturi: 1.44 (1-7/16)
Throttle Bore: 1.69 (1-11/16)
Booster Style: Straight
Booster Size: .140
Primary Idle Air Bleed: .074
Secondary Idle Air Bleed: .027
Main Air Bleed: .027

$127. Email to order or inquire. Trade in your old main body for credit!

View the Holley Old Model vs Q-Series Carb Sizing guide for historical and current carb sizing.