Super tuning car runs good shooting for great

I've run up to about 185psi or a bit more with aluminum heads on 87E10, and 22 * in the Vcan, for 44 to 46 total@2200 for cruising.And she wants more.
My initial is adjusted to 14*, and PowerTiming is 28*@2800,32/34 @3400.My centrifugal is running at about .8* per 100 rpm from 1000 to 2800 rpm, and then it slows down to bring in another 4* by about 3400.This curve lets me burn 87E10 for all circumstances.
Since such a huge part of my driving is to and from town;20 minutes each way, and since such a huge part of my driving is at low power settings, the vacuum advance was very important to me.For me,the vacuum advance smooths the cruise and PT power delivery, and keeps the oil cleaner.

Between this and overdrive, I was able to take a Hughes270* cam to 32mpgUS.
Final drive ratio was 1.965, making 65mph=1600 or so;so the 600 Holley was just barely open. That's what 185psi is good for.
We were cruising with traffic for a good number of hours, at around 2100rpm
At 2100, the centrifugal was about 23*. The vcan is able to add up to 22, but I no longer recall what the vacuum was on that trip. I think I was running full Vcan, so that would be 23+22=45*; about double. You cant do 45* on centrifugal alone.