Seen on the Mountain Home AFB fire dump this appears to be F-4C serial 63-7505 in very poor condition. She was previously listed as a Ground Instructional Airframe at Mountain Home and she is wearing the remains of an 'MO' code on her tail fin.
This Phantom fought in the Vietnam War, where she shot down a Mig-21 on 02. January 1967 using an AIM-9 Sidewinder missile. Preserved at the National Air & Space Museum of Chile!