"Its all about overturning momentum." - No offense man, but increased speed equals increased momentum. Slow the cars down and you decrease momentum. Not my opinion, scientific and mathematical fact.
"The objective is to get maximum performance while allowing the driver to maintain control." - Correct, a car biking on two wheels isn't maintaining control.
Lucky for me at Junior Honda speeds and on banked tracks I haven't had to adjust for this issue, but right now with how AJ's car is sitting in my garage if I had to, I would:
Move the 30lbs of lead (I love having a skinny driver) under his seat as far left as possible. Maybe even make the lower left side body panels out of a heavier metal to get the weight as far left as possible. One other option along this line is much thicker tubing for the left side nerf bar to increase the weight that is furthest to the left, but that is a very small gain in weight, but again still an option.
I would move the RR out the rest of the way, because we are 1/2" under the max width.
I would increase the RR tire pressure because we are in the 8 - 10 range right now.
If I really wanted to get creative too, I could move my lefts sides in another 1/2 - 3/4", but it would be a lot of work. If I needed to do it though, I would.
One thing I won't consider is wrapping the left side nerf bars with padding so AJ can rest his head on them.