What is the timing specs for a 1963 Chevy c10 v6?

There's no single "timing spec" for a 1963 Chevy C10 V6 because the exact specifications depend on the *specific* V6 engine installed. Chevrolet offered several different V6 engines in that era, and each had its own unique timing requirements. Further complicating matters, the timing can also vary slightly based on the engine's condition and carburetor setup.

To find the correct timing for *your* 1963 Chevy C10 V6, you need to identify the exact engine code (usually found cast into the block near the distributor). Once you know the engine code, you can consult a repair manual specific to that engine. These manuals will provide the proper timing specifications, usually expressed as degrees Before Top Dead Center (BTDC) at a specific RPM (e.g., 8 degrees BTDC at idle).

Without knowing the engine code, any timing specification I provide would be a guess and potentially harmful to your engine. Do not attempt to set the timing without the proper information. Using incorrect timing can cause serious engine damage.