short in distributor keeps reappearing - any ideas?

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I am thinking that I have a short also and appreciate any help. I am not a mechanic as you can tell.

1. About 3 yrs ago, replaced all parts inside distributor, coil, points, lower and upper plate with new black wire, all new wiring harness, stem to crank. Car ran nicely for short period of time.

2. In that same timeframe when we had it running, I tried to start it and would not start. Traced it to no spark. Changed coil again. Still no spark.

3. Traced lack of lack of connectivity to a 90 yr old ignition switch. Replaced it last week with new one from MacÂ’s.

4. Replaced old style (lower unit) condenser with new.

5. Car started for only 3-5 seconds - ran rough so I tried to advance points manually on column and engine quit. This has happened 2 times in about 30 attempts to start. Again no spark. Seems like it might initially have spark and then it goes away (why I think a short).

6. Noticed that Mac’s sells point terminal mounting kit with insulating washer so I ordered that. Also noticed in thread that condenser screw should have insulated washer. My condenser has 2 screws, one to hold it in place and other screws to ground lower plate. Which one gets the insulated washer?

7. Any other advice would be great.

God Bless