 The F @-@ 4J had improved air @-@ to @-@ air and ground @-@ attack capability ; deliveries begun in 1966 and ended in 1972 with 522 built . It was equipped with J79 @-@ GE @-@ 10 engines with 17 @,@ 844 lbf ( 79 @.@ 374 kN ) thrust , the Westinghouse AN / AWG @-@ 10 Fire Control System ( making the F @-@ 4J the first fighter in the world with operational look @-@ down / shoot @-@ down capability ) , a new integrated missile control system and the AN / AJB @-@ 7 bombing system for expanded ground attack capability . 
