If it aint broken... Fix it till it is!!!
I'd personally just leave it alone & enjoy... I'm of the less is more camp.
The most I might consider is swapping out the rear end to improve the "pick-up" so to speak.
If that wasn't enough then I might consider going to a lighter flywheel to get a more "aggressive/rev-veer" feel in the engine.
Plenty of fun can be had with 450-odd-horses.
Either way, enjoy...