65 289 correct timing question

[Woody3882]

I was just looking through some old shop manuals for my 65 mustang with a 289. One book says the timing should be set at 6 degrees, another says 9 degrees, and a video I watched says 10 degrees. Can someone please tell me the correct timing for my car. 65 Mustang with a 289, Holley 2 bbl carb, distributor has petronix, other that that it is basically stock.
Thanks
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[HemiRick]

you want to run as much timing as the fuel you use will allow without the engine pinging. More timing equals more power and milage.

 

[Woody3882]

Thanks Now I understand.