Hey Houston...I've actualy spent a great deal of time asking very similar questions around lowering/bike geometry/front-to-rear ride stance relationships, and actually TufBusa offered his thoughts that I felt really helped me make some sense of:
1. What was I really trying to accomplish...
2. What would be the cause/effect return after these changes...
3. There is a trade - and is it worth it...?
Basically, I had an 01 Busa - stock height with Heli-bars. Got in with a group of fast guys (in the turns) and I made great preogress in my cornering with their help, and freaking loved it! But I wanted to get in the turn faster/quicker...lowered the front 1.5", and raised the rear 1.5" (been a few years back now, numbers mite be off a hair but you get the idea of the stance). IT WAS AWESOME...felt like a freaking dream!
Then I high sided exiting a turn...bought a K8 and could not get it to turn (I'm always remembering "where I was on my 01 as far as ability"). After posting my ideas to duplicate that setup on my K8, Tufbusa offered some advice. I basically visualized the setup as being similar to a grocery cart...when you really push the buggy fast, and the front wheels want to flip/flop right and left even though the buggy is moving forward...? Like visualizing sitting the rear tire over the front tire instead of behind it. I feel that te setup was a contributor in the wreck (stability issues)...i made formal charges against my right wrist...the primary contributor!
So, based off my experience, I would say for handling/lowering the most I would attempt would be 1" down in the front, 1" up in the back.
For my current preference...I've stuck with stock front/~+1/2" up in the rear. Not exactly what you were looking for, but the cornering/stability issues swayed me to where I am. Playing Superman just to get a new bike will do that to ya!
If you search my posts/threads, there were several conversations I had with esteemed members of this Org that might give you more info.
Disclaimer: these were my opinions - based on my riding style, I know there are a ton of folks that can drag barends at the Dragon with a busa lowered 8"
...but I can't!!!