where is TDC with A/C pulley?

[alexandervdr]

On my 86 I can see the 3 120° markings on the engine pulley, however, the so called Z1 mark is hidden by the AC pulley. Is there another way to determine the correct position.
Is it correct that I see an advance ignition mark at the yellow arrow, and if so that this means the red marking is the Z1?

Is it true then that if I am at Z1 AND if the rotor of the distributor points at the yellow cylinder #1 marking, that then I am at TDC for cylinder 1?

[Jeff Alton]

You are at TDC. Another way to measure is with a degree wheel- difficult in car. The other is with a TDC indicator that screws into the spark plug hole, or other more primitive instrument.

Alternatively. You could measure around the diameter of the pulley between the 2 other known marks and replicate with the mark in question.

But, you are at TDC.

Cheers

[alexandervdr]

Thanks Jeff!