Ok, I assume, that you have by now read the Beginner Guides, do you?
Ok, so if it´s possible you can raise your FSB a bit like 105 or so and see if this works. Or you could change the multiplier from 4.5 to 5. It is quite possible that you´ll have to raise the Core voltage a bit perhaps 0.1 or 0.2 Volts. Have a good eye on your temps and use a good Heatsink when doing this. But I must warm you, the K6 Series are very bad overclockers. When you gain a 50 Mhz overclock, consider yourself lucky.