408 ignition curver advice

Softened the curve a bit from 1500-2500 . All in by 3k @ 3200.
Played with the VA as well . My idle vacuum is 9” and light cruise 15” . Higher speed max it out around 18” . I have an 8.5 VA can and set it to come in around 10”.
Next up is more carb tuning . Idles in low 13s afr. Cruises in the low 14s but rises to 15-16s if I creep into the throttle. Iam thinking this may be the PV . I will go up 1 to a 9.5 and see what happens .