I have 3 vac advance distributors (and 3 vac retards too!) and I want to swap one into my 1970 F engine but I need help picking which is best. They may not look great, but whichever I choose will be cleaned up/rebuilt. I plan on installing pertronix into whichever I choose. Talking with @65swb45 about that later this week. Just wanted to figure out what I’ve got before then. The one with the clear plastic octane adjuster looks the best to start with.