Description
Product Overview
The iFJF 1901R Quadrajet 4MV 750 CFM carburetor is a premium replacement for 1968-1973 Chevrolet and GMC trucks equipped with 327, 350, 396, 402, and 454 V8 engines. Featuring vacuum secondaries, manual choke, and a distinctive golden finish, this carburetor delivers the legendary Quadrajet spread-bore design in a brand new, ready-to-run package — no core charge, no rebuilding hassles.
Key Features
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750 CFM Spread-Bore Design — Small primaries for fuel economy and crisp part-throttle response; massive secondaries for full-throttle power when towing or hauling.
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Vacuum Secondary Operation — Secondaries open only when the engine demands it, preventing bogging and improving fuel economy compared to mechanical secondary carbs.
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Manual Choke — Cable-operated choke for reliable cold starts. Simple mechanical operation with no vacuum diaphragms or electrical connections to fail.
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Golden Chromate Finish — Corrosion-resistant coating that maintains its appearance and protects the aluminum body from fuel degradation and oxidation.
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Complete Assembly — Pre-calibrated and wet-flow tested. Includes base gasket and mounting hardware.
Compatibility
| Year |
Make |
Models |
Engine |
| 1968-1972 |
Chevrolet |
C10, C20, C30, K10, K20, K30 |
327, 350, 396, 402, 454 |
| 1973 |
Chevrolet |
C10, C20, C30, K10, K20 |
350, 454 |
| 1968-1972 |
GMC |
1500, 2500, 3500, C15, C25, K15, K25 |
327, 350, 396, 402 |
| 1973 |
GMC |
1500, 2500, C15, C25, K15, K25 |
350, 454 |
| 1968-1973 |
Chevrolet |
Suburban, Blazer |
350, 396, 454 |
Specifications
| Parameter |
Value |
| Part Number |
1901R |
| OEM Cross-Reference |
7026202, 7026203, 7026210, 7027202, 7027203, 7042202 |
| CFM Rating |
750 CFM |
| Barrel Configuration |
4-Barrel (Spread Bore / Square Bore Compatible) |
| Choke Type |
Manual Choke |
| Secondary |
Vacuum-Operated Air Valve |
| Body Material |
Die-Cast Aluminum (Golden Chromate) |
Why iFJF 1901R for Your Classic Truck?
The Quadrajet was GM's workhorse carburetor for over two decades. But original units are now 50+ years old — warped air horns, leaking well plugs, and worn throttle shafts are common problems. Our 1901R gives you the legendary Quadrajet design with modern manufacturing: precision CNC-machined metering circuits, properly sealed well plugs, and a brand new casting that hasn't been through 50 years of heat cycling. The result is a carburetor that starts easier, idles smoother, and delivers the fuel economy these trucks were known for when new.
Frequently Asked Questions
Q: Will this fit my 1970 C10 with a 350?
A: Yes, this is a direct replacement for your 1970 C10 350. The 1901R bolts to the factory Quadrajet intake manifold and uses the same throttle linkage and fuel line connection.
Q: Do I need to change my intake manifold?
A: No. The 1901R fits the factory cast iron Quadrajet intake manifold found on 1968-1973 GM trucks. No adapter needed.
Q: How do I connect the throttle linkage?
A: The throttle lever accepts the factory GM throttle cable and transmission kickdown cable (TH350/TH400). The geometry matches OEM specifications.
Q: Is this carburetor good for towing?
A: Absolutely. The Quadrajet's small primaries provide excellent fuel economy during cruise while the massive secondaries deliver full power for towing and hauling heavy loads.
Q: Can I convert this to electric choke?
A: This model is manual choke only by design. If you prefer electric choke, see our other Quadrajet-style options.
Q: What fuel pressure do I need?
A: 5-6 PSI maximum. Stock mechanical fuel pumps are ideal. If using an electric pump, install a regulator set to 5 PSI.
