You do not BORE an engine for bigger displacement. You have to use a stroker crank for that.
The max you can probably get on a 2.3L with stock rotating assembly by boring is maybe 2.5 or 2.6, and that more or less eliminates the possibility of boring it later because the cylinder walls will be so thin.
Esslinger sells kits to stroke the engine to a 2.8 and 3.0, but those are intended for race applications, and the kit to do costs more than your car is worth.