Again- you need to use more initial. The trick is the total advance has to be limited if it goes too high w/the amount of initial you need.
AFA leaking well plugs- the tell-tail on that as a problem is if the carb float bowl empties overnight. This will usually leave a small hit of fuel in the bottom of the accelerator pump well, but unless the engine starts and runs well when cold (or has an electric pump), the engine will often stall after starting, then will take a lot of cranking for the mechanical pump to refill the bowl.
I have no idea what the percentage is of Q-jets w/leaking plugs. On the post ~1968 Q-jets, the secondary
plugs are spun in then peened, so to speak. The main
plugs are pressed and sealed w/a soft metal around them- and they can and do leak on some carbs, regardless of the year.
Even though Ruggles recommends Marinetex epoxy, epoxy is not the way to fix a leaking main well plug- tapping them for a machine screw works much longer- as in forever. Epoxy will eventually delam from the metal and the leak will resume.
It is very easy to set the secondary air valve to open fully.