Holly carb help

Your right
You don't need to have an advance ....and locked out is not only for fuel injection.

More clearly ....the timing locked @36 a is not the cause for the rich condition you have. You can tune for both with or without a curve. Understand that having a curve would bring the timing down at the lower rpms from the 36 now and then steadily raise to the 36...at some rpm, say 2800-3000 or where it stalls at, 3500
Less timing is gonna clean up the plugs? No fkn way.lol get the idle back on the primary side and not the secondary like you say you have it idling on.
What I'm trying to figure out is how you mostly drive this car and why was it the way you got it.