12B
8 to 10 degreds btdc
www.motorcraft.com shows the ignition timing for a 1979 F150 with the 460 cubic inch ( 7.5 liter ) V8 , automatic transmission , as 14 degrees BTDC
The timing for a 460 Ford engine is 14 degrees before top dead center. The engine should idle at about 600 rpm.
turn it to the right.
Gose counterclockwise on 302-360-390 and 460.
According to my Chilton's Auto Repair Manual : For a ( 1970 ) Lincoln Continental , 460 cubic inch V8 engine The ignition timing is set at ( 10 * Before Top Dead Center )
10 degrees BTDC ( unless engine compartment decal shows different ) for the 7.5 liter ( 460 cubic inch ) V8 engine in a 1989 Ford truck
8 btdc @ 800 rpm
12 degrees BTDC.
It depends on the year, which engine code it is, what emission equipment is installed etc. Check the underhood specifications sticker - hopefully it is still there and readable. It should be in front of the radiator somewhere.
if this is a 460 eng efi it should be on the side of the distributor. Hope this helps