That would be the top of the compression stroke on the number one cylinder.
TDC is 0 degrees TDC, not 10 degrees BTDC which is before top dead center. ATDC is after top dead center. Both of these in relation to piston height are "below top dead center".
12 degrees before top dead center.
Bottom...
on top of the transmission
top dead center is what it stands for. top dead center
6 degrees before top dead center
It is 6 degrees before top dead center.
The top dead cente
10 degrees before top dead center
The timing for a 460 Ford engine is 14 degrees before top dead center. The engine should idle at about 600 rpm.
The top dead center is when the piston has reached its peak and can go no farther up, it has reached its summit. The bottom dead center is when the piston is at its lowest point.
looking at the timing marks from the top left to right you have 5 degrees after top dead center, then top dead center then 5 degres 10, 15 then 20 befor top dead center. the timing is 7 degrees before top dead center