Do you have the Huge bowl on it? I've heard of severel guy's sucking them dry at WOT with the small bowl.

You should not need a large float bowl if you have the right sized float valve (needle and seat) and fuel pressure.  A larger float bowl only adds a little more time or distance until you run into the same fuel starvation problem you had with a small float bowl.  Don't put a band-aid on it.  Fix the fuel supply INTO what ever float bowl you are using.  You cannot tune a carburetor when the fuel level is not staying the same inside of the float bowl.