2.5 Petrol Timing

Good afternoon,
Finally got my 110 through it's MOT and working getting it running right. I've got a new distributor for electronic ignition and have just gone to check the timing before installing it, however I can't see any marks to line up to the arrow on the pulley. Any advice? It's a 1988 2.5 petrol.
Thanks

Have you looked at the pulley all the way round? Cleaned it?
Got any pics of it at TDC number 1.

You may have to go back to old skool basics to find TDC then you can mark it and set from there.

J

Just working through an issue with my 85 2.25. it was gummed up but a wire brush gently revealed it. Then marked the centre with a paint pen. Mine is meant to be TDC static but it's way off and I'm not sure if it's the fuel I'm using or something else. But I will endeavor. Just brought some good books for it so can start reading.