Complex sentence: He was also responsible for a number of concept cars and lobbied for the production of several, including the compact Tarpon that ultimately led to the large Marlin; and also for continuing production of the two-seat AMX models after 1970.
Split into simpler sentences: He was also responsible for a number of concept cars and lobbied for the production of several, including the compact Tarpon that ultimately led to the large Marlin. He also lobbied for continuing the two-seat AMX models after 1970.