I'd be curious to disconnect and plug the vacuum line and take it for a ride.
If it likes a bunch of initial advance,I'd take some out of the mechanical advance,or go lighter on the springs and use the vacuum can, ported, for fuel mileage at light throttle cruise.
I'm sure someone has some #'s that are a good baseline for your combination, what you have may very well be that.
Does the carb respond well to adjusting the idle mixture screws? You can stall it by closing them and make it stink fire by opening them too much?
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