You have a slot one motherboard. Search ebay for a slot 1 pentium 3, for about 130 bucks (think jarhed is smoking something), you can get a pretty fast pentium III 1.2 Ghz+. That'll whip ya thru anything that you need to do
Also, the 370 socket, dosent give you a choice of a faster processor. Stick with the slot one, and get yourself a Pentium 3