Got this right from malibu racing
What engines were available in the 78-83 Malibu?
Here is a list of engine codes listed for the 78-83 Malibu. I'm not totally sure that ALL were actually available each year, but they are listed as an option code for each year:
Year Model Available Engines
78 200 V6 (95 HP), 231 (3.8L) V6 (105 HP), 305 V8 (140 HP), 350 V8 (165 HP)
79 200 V6 (95 HP), 231 (3.8L) V6 (105 HP), 267 V8 (125 HP), 305 V8 (140 HP), 350 V8 (165 HP)
80 229 V6 (110 HP), 231 (3.8L) V6 (105 HP), 267 V8 (115 HP), 305 V8 (140 HP), 350 V8 (170 HP)
81 229 V6 (110 HP), 231 (3.8L) V6 (105 HP), 267 V8 (115 HP), 305 V8 (140 HP), 350 V8 (170 HP)
82 229 V6 (110 HP), 231 (3.8L) V6 (105 HP), 4.3L V6 Diesel (85 HP), 305 V8, 350 V8 Diesel (105 HP)
83 229 V6 (110 HP), 231 (3.8L) V6 (105 HP), 4.3L V6 Diesel (85 HP), 305 V8, 350 V8 Diesel (105 HP)