Using vacuum gauge to tune engine?

LovetheA's said

Moparofficial
I recently after fussing with it a little more got it to about 12-13deg in Hg. But I haven’t right now been able to get it below 1000rpm without it running rough. When I adjust the rpm’s up to @1000m it smooths out. But now that AJ/Forms has chimed in I’m rethinking what I have done. I think I may have more to do?

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That reading and 1000rpm makes sense.
Tell me what carb again? It sounds like you need to do what someone may already have said.. and increase the initial timing so you can get the blades in the transfer slot set the correct mixture for it too idle. Another trick is If you take the heavy spring out of a stock distributor and run just the stock light spring it will with 35 degrees give 18 initial. It will be half way into the centrifical advance at a 800 idle rpm.