Fair warning, increasing BCLK overclocks lots of other things besides your CPU, things that shouldn't or dont like being overclocked. This could result in component (video card, hard drives, motherboard) damage, you have been warned!
non k series are multiplier locked, you can change the BCLK from 100, to perhaps 101 or 102. Most motherboards don't like going much higher then a few mhz on this.
Its not worth the risk for the very small boost you could get. If you want to overclock, get a 'k'.