I changed it when I checked and rebuilt it. I like to get the advance in quickly, all in by 3000 rpm, with a limiter on the vacuum advance set to 10 degrees. If it needs more, its easy to change once the car gets on the road. The trick is to keep it steady up to about 1500-1800 so when setting the timing, its stable and not trying to advance. They also start easier if you can keep the initial around 10 but still advance enough for a total around 34.
Joe
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