Carter ceased production of the Thermo-Quad after the 1984 model year. Chrysler switched to the Rochester Quadrajet M4ME and E4ME for 1985-1989.
- M4ME = "Modified" (post 1974), 4 barrel Quadrajet, electric choke, non feedback.
- E4ME = Electronic feedback, 4 barrel Quadrajet, electric choke...