1. Visual Inspection: This is the most straightforward method. Look for the Edelbrock logo and model number. The model number will be stamped or cast into the carburetor body, usually on the top or side. Take a picture for better identification. Common Edelbrock model numbers for GM applications often start with a "1400," "1405," "1406," or similar series designations, but the specifics depend heavily on the year of the engine, intended application, and modifications done to the vehicle.
2. Casting Numbers: Besides the model number, there might be other casting numbers on the carburetor. These are less user-friendly for immediate identification, but you can potentially use these numbers to cross-reference them with Edelbrock's website or other online resources dedicated to carburetor identification.
3. Size/Configuration: Note the carburetor's size (e.g., 600 CFM, 750 CFM). This will help narrow down the possibilities, though many Edelbrock carbs come in various CFM ratings. Also, look at the number of barrels (2-barrel or 4-barrel). A 305 typically uses a 4-barrel.
4. Throttle Linkage and Other Features: The way the throttle linkage is set up can provide clues, though this is less reliable than the markings on the carb itself.
5. Online Resources: Once you've gathered information from the visual inspection, search online using the model number (if found) and/or the CFM rating. Edelbrock's website is a great place to start, along with various automotive forums and parts catalogs.
In short, you have to physically examine the carburetor on your 305 to identify the specific Edelbrock model. Don't rely on assumptions; always check the carb itself.
