HalyCare Rochester Quadrajet Carburetor Rebuild Kit for 72–78 Chevy — 4MV Fit, Nitrophyl Float & HD Pump

HalyCare's Rochester Quadrajet rebuild kit refreshes your 4MV carburetor with a complete set of OEM-style parts so you can restore proper fuel control on 1972–1978 Chevy cars and trucks.

If your Quadrajet is leaking, hesitating, or uneven at idle, a full rebuild kit is the most reliable way to return it to predictable operation without buying a new carburetor. This HalyCare kit supplies a nitrophyl float, fuel filter, all gaskets, needle and seat, a heavy-duty accelerator pump assembly (with delayer and return spring), check ball, seals, clips, well pad, pump pin, mounting gasket and a printed instruction sheet—everything needed to service a range of Rochester Quadrajet numbers used on Chevy 350, 396, 400 and 454 engines from the early-to-late 1970s.

Which carburetor models and years will this kit fit?

This kit is designed for the 4MV Rochester Quadrajet family used on Chevrolet passenger cars and trucks from approximately 1972 through 1978. Refer to the casting or tag on your carburetor to match OEM numbers before ordering.

• Fits common Chevy passenger car Quadrajets (examples: 7043200–7043213, 7044201–7044226, 7044500–7044526).
• Fits Chevy truck Quadrajets across 1972–1978 (examples: 7042206–7042207, 7043200–7043527 series).
• Also covers later replacement and GM part numbers listed in the product images for cross-reference.

What parts are included and why they matter?

Every wear item and seal that commonly causes leaks, flooding, hard starting or weak throttle response is included so you can perform a thorough rebuild in one service session. The kit uses a nitrophyl float for consistent buoyancy and a heavy-duty pump assembly to improve fuel delivery durability.

• Nitrophyl float and fuel filter to prevent fuel level and contamination issues.
• Needle and seat plus all gaskets and seals to stop leaks and restore metering accuracy.
• Heavy-duty accelerator pump assembly with delayer and return spring for responsive throttle transitions.
• Check ball, clips, well pad, pump pin, mounting gasket and instruction sheet for complete reassembly.

How difficult is installation and what should I prepare?

Basic mechanical skill and a clean workspace are required; many DIYers with hand tools can complete the rebuild in a few hours. Follow the included instruction sheet and photograph reference numbers on your carburetor to confirm compatibility before disassembly.

• Recommended: carburetor rebuild stand, gasket scraper, small picks, torque wrench, and carb cleaner.
• Inspect float height, accelerator pump travel and all metering surfaces during reassembly.
• Test for leaks and proper idle/fuel delivery after installation—adjust as needed to match engine calibration.

Who is this for: This HalyCare kit is aimed at classic Chevy owners, restoration shops and DIY mechanics who want a cost-effective way to renew a Rochester Quadrajet 4MV carburetor rather than replace it. If you have a 1972–1978 Chevrolet car or truck with a 350, 396, 400 or 454 engine and your Quadrajet shows fuel-level issues, hesitation, or leakage, this complete rebuild kit supplies the common replacement components to get the carburetor functioning reliably again. Always confirm the carburetor casting or tag number against the product images before purchase to ensure fitment.