A couple of things I learned that may be helpful.
The locking plate for the distributor may need adjustment, which you can do by loosening this bolt, which is not very visible. I also replaced bushings in my distributor.
The distributor can only go in two different places, and one is out 180 degrees. If #1 is at 9 o'clock instead of 7 o'clock I believe your oil pump gear is off by one tooth. You should still be okay to get it running, but your vacuum advance may not fit in place very well.
If you're vacuum advance has been replaced there is a chance it may not be correct. This is the correct one.
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