Metering Blocks & Plates

Pri. & Sec.Metering Block kit for 1850,3310 type carbs. Designed to work with vacuum secondary carburetors that have 2 or 4-corner idle. This kit is a combination of 34-8 and 34-66 metering blocks but also includes longer transfer tube for side-pivot fuel bowl applications.

Our billet aluminum metering blocks are machined to very strict tolerances then anodized for protection and good looks. CNC cut from premium aluminum and filled with precision parts, these blocks provide the ultimate platform for your performance carburetor.

Standard calibration for out of box performance - designed to fit most real world street & strip carburetors. Simply add your jets and power valve to complete the installation. Includes the following items. 4-corner idle, must have correct throttle body and main body.

Adjustable idle feed restrictions

3 pre-drilled emulsion channels

Non-stick gaskets

Exclusive QFT positive retaining vent baffle

Stainless steel idle mixture screws with nylon seals.

Primary spark advance tube (for use with vacuum advance distributors)

Extended transfer tube (with replacement seals) for side-pivot fuel bowl applications.

Detailed installation instruction sheet

(Requires QFT 6-32 thread bleeds for modification)

SOLD AS A KIT THAT INCLUDES BOTH PRIMARY AND SECONDARY METERING BLOCKS