Al, are you serious? The Pertronix drop-in points replacement module has been a well-known thing since the 1980s. I have installed a few, most recently in my FV.
95% of carb problems are ignition. But if the car has sat, it probably has a plugged jet or two. Are you experienced with multi-throat carbs? If not, the learning can be difficult for some guys.
In my experience, the transition from idles to mains can encompass 1500 to 3500 rpm, depending on the individual engine.
I'm not familiar with the idle or full advance timing needs of a 912 engine, but idle advance is irrelevant(1874A Pertronix is for 009). Only set an 009 at 3000 to 3500 rpm to nail full advance. Unless you have a vacuum-can equipped distributor. In that case, refer to the specs for your engine.