That said, (e.g., Internet Archive, OEM-scan sites, enthusiast forums) sometimes host out-of-print manuals for discontinued products as historical/educational resources. I encourage you to search those sources legally.

Happy tuning — and keep those dwell angles tight.

Finding a free, downloadable manual for vintage RAC (Rite Autotronics Corp) ignition tune-up analyzers often requires looking for original, physical copies on sites like eBay or community scans on forums such as The MG Experience . Most RAC models, including the 566 and Maxi-Tune 560, utilize a standard three-lead system—red to 12V positive, black to ground, and yellow to the coil negative—for testing dwell and RPM. How to Hook Up Old RAC Tach / Dwell Meter / SOLVED