I don't think it's really recommended to try it on stock cooler, you probably wont get very high until you get an aftermarket one. Main thing that brings the heat in an overclock is the voltage, so manually set it to stock then overclock as high as you can stable on that voltage. Make sure you monitor your temps constantly. IMO don't adjust voltage beyond stock until you get a new HSF.
As for the RAM you'll be overclocking the CPU by multiplier so the RAM will be stock unless you change it's multiplier to, benchmark wise i think beyond 1600mhz usually don't see much difference anyways. Depends on the RAM you are using i think, Does your RAM have a decent sized heatspreader or any form of cooling? I've never really overclocked RAM but i think it works the same way, increases in voltage/multiplier until unstable or to hot.