Tuning a 2300 Holley Carburetor is a straightforward process thanks to Holley’s simple design and exterior tuning capability, meaning the carburetor may be adjusted on the fly while mounted to the intake manifold. The Holley 2300 is a double barrel, manual choke carburetor with an air flow rating of 500 CFM (cubic feet per minute), designed for mounting on small block American engines of the 1960s and 1970s with square bore mounts.
Place the vehicle on a flat surface.
Remove the fuel bowl sight plug screw and evaluate the fuel level. Ensure that the fuel trickles out of the port hole.