Overclocking AMD 2600+ XP

Right now I have it was 181mhz with the 12.5 multiplier locked, and had to up it to 1.8v so it would be stable. Was 1.5v at 166/12.5.

How safe is it to run at this constantly?

I noticed its always a lot hotter than it used to be and unless I take off one of the drive covers it wont go below 52C. Once I do that it will drop down anywhere from 37-45C.

I'd like this computer to last me a little while, but Id like to get the most out of it in that understanding.

If anyone has any suggestions let me know so I can try it.

I tried searching for any 2600+ overclocking on here and didnt find any.

Thanks.