Here's what you need to think about:
* Intake Manifold: A single-barrel carburetor uses a specific intake manifold. You'll *absolutely* need a new intake manifold designed for a dual-barrel carburetor. Finding the correct manifold for your engine (e.g., a small-block 350, a 250 inline-6, etc.) is crucial.
* Carburetion: Choosing the right dual-barrel carburetor is important. You'll want one that's appropriately sized for your engine's displacement and intended use. Too large, and you'll lose low-end torque; too small, and you'll limit power. Consider the performance goals; a performance-oriented carb will be different from a more fuel-efficient option.
* Fuel Delivery: Your existing fuel pump and fuel lines might be inadequate for a dual-barrel carburetor, especially a high-performance one. You may need to upgrade your fuel pump and possibly the fuel lines to handle the increased fuel flow.
* Air Cleaner: You'll need a new air cleaner assembly designed to fit the dual-barrel carburetor and intake manifold.
* Jetting and Tuning: Dual-barrel carburetors require careful tuning to ensure proper fuel-air mixture for optimal performance and fuel economy. This usually involves adjusting jets and other components based on your altitude, engine modifications, and driving style. You may need professional help with this.
* Legal Considerations: Check your local emissions regulations. Installing a larger carburetor might violate emission standards in some areas.
* Engine Modifications: Depending on the modifications already done to your Nova's engine, a dual-barrel carb might further stress other components, like the ignition system, camshaft, and exhaust system.
In short, while it's *possible*, it's not a straightforward swap. It involves significant mechanical work and requires a good understanding of carburetors and engine tuning. If you're not experienced with this type of work, it's best to seek the help of a qualified mechanic.
