hey bean crusher you can start trying to OC that 233. if you have the manual for your mother board, or know the brand and can find their web site,try upping the voltage to 75mhz from the current 66mhz.
you will do this by moving some jumpers around, easy to fix if no work.
most of the 233's i,ve seen do this no problem. at most you might need to get a little better heat sink,but i doubt it.this will put you in the 262mhz range and get your OC habit started
have fun