Need new engine - what should I expect to pay? on 2001 Ford Excursion

Hi. Was just told by my regular mechanic that we need a new engine. Our Excursion has been making noise during acceleration for about 3 months. It has gotten steadily worse and is now really, really loud. I'll need to take the vehicle to another mechanic since mine now longer does big jobs. What should I expect to pay?

Asked by for the 2001 Ford Excursion
Maybe this company can help you they are nationwide