You don't need to overdose on caffeine at all.
Concentrate on being healthy, recovering and keeping your test levels high.
-keep your protein high
-keep your good carbs high
-get lots of sleep
-get lots of water
-get LOTS of vitamins and minerals (i use animal paks....until Biotest has something better)
-getting lots of fruit
I'd also suggest a decent-sized lean steak the night before.
Then maybe one shot of espresso or some Spike before the game and you'll be ready to rip the hood off a car.