@McTrinsic
Some months ago,with a my friend...we have overclocked an Apollo 1230 33mhz to 50mhz...but we have done this,because the 030 used for the 33mhz version is the same used for 50mhz version,the only difference is the oscillator.
Before you have to know if the 030 of your card is the same used for higher version..then you can trt to overclock.
In my opinion 100mhz for a 030 it too..even with a fan cooler.
I think that 50mhz will be ok.
Probabily your 030 runs at 25mhz because there is a limiter,jumper soldered in.