What is the timing specs on a 390 big block 1966 fairlane?

The timing specifications for a 1966 Ford Fairlane with a 390 big block engine typically call for initial ignition timing to be set at around 6 to 10 degrees BTDC (before top dead center) at idle. The total timing, which includes both initial and advance, should generally be around 34 to 36 degrees at higher RPMs, usually around 3,000 RPM. It's important to ensure that the engine is set up correctly and that the timing is adjusted according to the specific requirements of the engine and any modifications made. Always refer to a service manual for the most accurate specifications.