It's partially correct. Remember also A300B1 (built only 2 aircraft) and A300B2 (it's older than A300B4). The exception in Airbus A300B4 family are A300B4-600, those aircraft don't require a flight engineer.
In the Boeing case, 767 is a newer model, but there were 767 with flight engineer panel. Ansett Australia was the only carrier to order some 767 with 3 cabin crew member.
Well, I will answer the second trivia, because anyone didn't answer.
- JT9D-7R4D 48000 lbf 767-200, 767-200ER and 767-300
- JT9D-7R4D1 48000 lbf Airbus A310-221
- JT9D-7R4E 50000 lbf 767-200, 767-200ER and 767-300
- JT9D-7R4E4 50000 lbf 767-200, 767-200ER and 767-300
- JT9D-7R4E1 50000 lbf Airbus A310-222
- JT9D-7R4G2 54750 lbf Some Boeing 747-200 and Boeing 747-300
- JT9D-7R4H1 56000 lbf Airbus A300B4-620
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