In 1972 Vought modified the first TF-41-powered A-7E (BuNo 156801) as a tandem, two-seat combat trainer demonstrator. A seat for a second crewman was added in tandem, with both crew members sitting underneath a clamshell. The student sat in front, the instructor in the rear.
In order to accommodate the second crewman, the aircraft had an extra 34-inch plug added to the fuselage forward of the wing. The instructor in the rear seat was raised somewhat higher than the pupil in front, giving the aircraft a distinctive hump-backed appearance. Despite the second seat, the aircraft retained full combat capability.
In 1982, eight TA-7Cs were modified as EA-7L electronic aggressor aircraft. These planes were equipped with the ability to carry jamming pods and missile simulators on underwing pylons to duplicate Soviet weapons and tactics during training. They were issued to VAQ-34, based at NAS Point Mugu, California in 1983.
In 1979, LTV received a contract to convert an A-7D to two-seat TA-7D configuration. The TA-7D was a two-seat advanced trainer with dual tandem seating, both crewmen being housed underneath a single canopy with the seat in the rear being raised. It was given a longer front and rear fuselage. The two-seater had full operational capability and could carry the same weapons that the single-seater could. The aircraft was later redesignated A-7K.
In addition to the prototype, Vought built 30 new A-7K two-seaters. Unlike the Navy's TA-7Cs, the USAF's A-7Ks were new builds and were not conversions of earlier single-seaters. Delivery to ANG units began in 1981, and production of the A-7K ended in September of 1984.
The A-7H (H for Hellenic) was a version of the Corsair II built for the Elliniki Aeroporia (Hellenic Air Force) of Greece. It was essentially similar to the USAF A-7D. The first of 60 A-7H flew for the first time on May 6, 1975. There were also five TA-7H two-seaters built. Since they were built under FMS contracts, they were issued US Navy Bureau Numbers. In the 1990s, 36 A-7Es and TA-7Cs surplus to US Navy requirements were transferred to Greece. TA-7Cs were converted to in-land operations by the removal of the catapult bar from the nose gear, repositioning of the taxi light from the right main gear door to the nose gear strut, while it retained air refuelling capabilities, it was never used. A para-brake system was also retained from the original TA-7C.
The Forca Aerea Portuguesa (Portuguese Air Force) has operated a version of the Corsair II since the early 1980s. The designation A-7P (P for Portugal) was assigned to this version. They were issued to Escuadra 302 and 304 based at Monte Real. A single TA-7C was loaned to the FAP for 3 years. A second batch of A-7Ps was ordered in September of 1982. 24 A7Ps and six TA-7Ps were provided. Deliveries of the A-7Ps began in October of 1984, where they were issued to the newly-established Esq. 303. The TA-7Ps followed in May of 1985. Prior to that, only a single leased TA-7C was available. The TA-7P was a land based convertion from A-7As into TA-7C standards, but under Portuguese requirements. As with the other 'T' versions, it retained full weapons capability.