| Make |
Models |
Engine |
| Chevrolet / GMC |
Silverado, C/K Series, Camaro, Chevelle, Nova, Impala, Suburban, Blazer |
305, 327, 350, 383, 400, 454 V8 |
| Ford / Mercury |
Mustang, F-150, Torino, Cougar, Fairlane, Galaxy |
302, 351W, 351C, 390, 428, 460 V8 |
| Chrysler / Dodge / Plymouth |
Charger, Challenger, Road Runner, Barracuda, D100/D150 |
318, 340, 360, 383, 440 V8 |
The electric choke on the 1406 makes cold starts effortless — just pump the gas once, turn the key, and the 12V choke element handles the rest. The AFB-style metering rod system delivers consistent air/fuel ratios without the power valve failure headaches common on competing designs. Whether it's a daily-driven Silverado, a weekend Mustang, or a restomod GMC, the 1406 is the most popular street performance carburetor for a reason.
Frequently Asked Questions
Q: How do I wire the electric choke?
A: Connect the choke's positive terminal to a 12V ignition-switched source (key-on power only). The most reliable connection point is the ignition coil positive terminal or the fuse box IGN terminal. Do NOT connect to the alternator or a constant 12V source — the choke only needs power when the engine is running.
Q: Will this fit my Ford 302?
A: Yes, it fits any engine with a square bore intake manifold. For Ford 302 applications, pair with a Performer or Performer RPM intake manifold. You may need a throttle bracket adapter for Ford throttle cable compatibility.
Q: What's the difference between the 1405 and 1406?
A: The 1405 has a manual choke (cable-operated), while the 1406 has an electric choke. Internally, the jetting and calibration are nearly identical. Choose the 1406 if you want automatic cold-start convenience; choose the 1405 if you prefer manual control or are building a race/off-road application.
Q: Do I need a calibration kit?
A: The 1406 comes pre-calibrated for typical street V8 applications from sea level to approximately 4,000 feet. At higher altitudes or for modified engines with aggressive cams, a metering rod/jet calibration kit is recommended.
Q: What fuel pressure is required?
A: The 1406 operates best at 5.5-6.0 PSI fuel pressure. Use a quality fuel pressure regulator if your mechanical or electric pump exceeds 6.5 PSI, as excessive pressure can overpower the needle and seat.
Q: Is this compatible with EGR?
A: No — this is a non-EGR carburetor designed for performance applications. For off-road and racing use only where emissions equipment removal is legal.
