Found my dads original 1971 duster!

Setting timing is very, very simple to do. You need to get a good light and learn to do it yourself. That way, you know what you've done and what you have.
I learned how to do it today. But the snap on light we used is an older one, with no display on it. We set it using the 10 before and 10 after scale that is stamped onto the pulley type thing. The reason don’t know the exactly number is because the scale only goes up to 10 and you can’t see the line once you advance it much past that 10 mark

I plan on getting a timing gun, but that still doesn’t give me the experience of knowing exactly what it is that my engine/car wants, or what to actually set it to. Even the engine builder emailed me detailing that the total timing should be around 34….but that’s at a certain RPM, not at idle etc. That all situations and engines are different. I definitely want to learn and I’m trying