Appreciate some input on spark plug reading

Fuel pressure does not mean fuel in the bowl. Don’t think fuel is your problem though. An issue I ran into is the rotor being too high in relation to the cap terminal. So the arc marks were up not out towards the terminal face. It would flutter a bit at higher rpm’s. Very subtle. Filed the bottom of the rotor and no more flutter. “Soft at the top” could just be air quality. In air flow restricted engines, (which almost all stroked LA’s are) air quality really hurts. I can see 3-4 tenths change just due to air quality and I have chased my tail trying to get it back by tuning…..never been successful. What heads?
I should have listed the heads right up front - my bad. They are simple Eddie RPM with somewhat mild bowl porting. So I believe these to be the limiting factor for my combo.
It's not that I'm not happy with it. But like everyone, I want to get all there is out of what I've got!