I’ll do you one better Nancy. Los Potrillos on 15th Street in Plano (just east of Central) has arguably the best tacos this side of Los Cabos. And yes, they have cabeza, buche and lengua, if that’s your bag. I’m content to stick with the pastor and bistek, myself, but to each his own. Since it’s right down the street from the farmer’s market, it’s a must-stop for Plano folks.