has anyone done this modd??

http://www.j-body.org/library/howto.php?1

i wanna know if anyone has done it ........does it work?

no and yes

Unless you're track racing you don't need it. Motors run with the highest performance and best mileage at whatever temp the thermostat is from the factory.

Of course, this logic goes out the window once you start getting into more power. Power = heat.