The fuel plate is like a idiot light, it prevents people who don't watch their gauges from burning up their motor. Adjust the AFC correctly and let AFC spring match the fuel to boost instead fuel to throttle postion.
I personally don't like fuel plates, but they do have there place. To limit fuel on a truck with multiple drivers such as a company truck or one you might lend to your 16yr old son.
If you don't have an EGT gauge or don't want to worry about watching it then a fuel plate would be needed. Other wise drive your truck. And remember that fuel plates only limit max fueling at a given rpm. They don't produce different fueling curves - the AFC spring does that.