To find TDC #1 compression stroke. You take the #1 plug out, plug the spark plug hole with your finger, rotate the engine until you feel a burst of air. Then line up the marks on the harmonic balancer to the pointer at 0. Then line up the rotor button between post 1 and 3 on your distributer cap.
To answer your question, if you have everything above done right. The rotor button will be between #1 and #3 on the cap. Does that answer your question?
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