You want the TDC on the compression stroke of the #1 cylinder, then drop in the distributor with the rotor pointing to #1 on the distributor cap.
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".
bring number 1 cyldenr to top dead center before installing gears bring number 1 cyldenr to top dead center before installing gears bring number 1 cyldenr to top dead center before installing gears
TDC would be "Top Dead Center". BTDC would be "Before Top Dead Center".
Before top dead center
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
"What is the symbolism of finding a dead caterpillar?"
93-98 240sx timing is 18-22 before top dead center
It is look like ruler with 0, 10, 20 number XXXXXXXXXXXXXXXXXXXXXXXXXXXXX The timing scale will have an "A" at the top and a "B" on the bottom. In the center is a "0". The "A" is for after top dead center. The "B" is for before top dead center. Each mark on the scale is 2 degrees. Timing is always set on before top dead center.
what engine do you have in your impala?
16 degrees before top dead center
The piston will usually be a few degrees before top center.
timing is 10 degree before TDC