I've been soaking the screws on the distributor for a month or so. The screws were still stuck solid. I had to carefully heat the distributor body then use a hand impact. It was a slow painful process. The screws must be hardened steel because they didn't just snap off (much to my surprise).
I need to do some research to figure out how to get this take apart fully so I can check and rebuild all parts of it. I'm not sure if the vacuum advance can be safely replated.
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