The 65 383 blocks had the boss by the oil pump tapped for the motor mount bracket that was the same as the A Body 383 cars.The D/S motor mount bracket was also same as the one used on the 383 A Bodies. The 440 A Bodies had a different D/S MM bracket.This block will fit into an A Body with the factory BB K frame! Trans is probably a cable shift, a desirable core to have also!