DV,
You're having Way too much fun, wish I was there.
Just don't push it till it breaks.
Maxrpm,
To go in the right direction.....
Replace your rear coilover springs with 140# springs and pre load the pass side rear with 2 extra turns,that will help the tires stay planted.
Also add a panhard bar, [5th link] will keep you straight at the top end.
Perry.