Bob2000.com is a good source for guides and tuning tips for a Holley carburetor. This site provides tips for tuning different parts of the carburetor include throttle, accelerator pump linkage, idle mixture, ported spark vacuum and air cleaner.
Bob2000.com provides information on fixing common carburetor problems, such as sooty spark plugs, inconsistent idle speed and gas flowing from the wrong place. In addition, it provides guides on completing different tasks, including hooking up electric chokes, switching from automatic to manual chokes, checking fuel pump output and changing from vacuum to mechanical and vice-versa. The site also provides books and videos that visitors can buy from Amazon.