It is always a good idea to remove the stock heatsink and add some active cooling to your Voodoo3.
This is what I did :
Put the card in an antistatic bag, close it tightly and put the bag into a refrigerator for lets say 1 hour.
After that get the card out and let it dry.
The low temperature in the fridge should make the thermal epoxy between chip and stock heatsink more breakable. I could quite easily take off the heatsink ( you may need to twist and turn it gently ).
After that I cleaned the chip thoroughly with isopropanol ( pure alcohol will do also ).
I had some old heatsinks of those pentium-I days left, so I took one of them for the Voodoo3.
As there were no mounting holes on my V3 I had to use thermal compound ( i.e. from Arctic Silver ) to glue the new heatsink onto the chip.
I let it dry for several hours and mounted a small fan on top of the new heatsink. Maybe its a good idea to run the fan at 5V, so its almost noiseless.
The disadvantage : The new cooling solution is bigger than the stock cooling, so I "lost" my first PCI slot. But thats OK.
With this I was able to run my V3-3000 at 200 Mhz stable.

Let me know what you think...

Well, one hour in the fridge won´t hurt the components on the card. I have done it many times and never had problems.
For pure alcohol ( or Isopropanol ) ask in a pharmacy, its really cheap.
Your card has 6ns ram on it, so it is built for a clockspeed of 166 Mhz, with a little luck it will do 183 Mhz also.

And if you once overclocked the memory too  high,  you can get artifacts. For example I bought a Geforce 4 MX form a friend for just 25 euro's. The card was only cooled by a small zalman 37 heatsink, and he sad that he could overclocked it very well ( I never really believed him). Well wenn I bought his card for just 25 euro's at that time the card was worth much more. I cooled the card with a Zalman 80 en copper heatsinks on the mem.
But after a couple of months more and more artifacts were appearing on my screen, until it came to a point that when installing drivers I couldn't the normal way because the Bios didn't recognize the card. I had never really overclocked the card, so because my friend  and the owner which he bought the card from pushed the card TOO high, i were getting the artifacts after a YEAR.