Timing problem

That is the whole point of the steps I wrote out for you above. Follow them carefully and you'll be close on timing. Print it out and take them to the garage if you can.

The critical thing is to watch very closely for the exact place where the points juuuust start to open as you rotate the distributor CCW. Lock down the distributor at that exact point and you will be very close. I have set all sorts of engines in this way for 30+ years for initial start-up timing, and the timing is always really close.