V8 fuel pump on a V6?
 

I have an extra fuel pump out of my 2001 WS6 with about 46k on it, Would it work on a V6 without any tuning?

If you are going to go through the hassle, you should just install a new full module assembly instead of messing around with swapping in a pump with 50k on it. But if you must, a fuel pump that pumps more than you need has nothing to do with tuning, your pressure regulator will handle it, any unused fuel just goes back into the tank.