360 vs 383

Not really taking sides, as I like both motors, but in the sixties, Hot Rod Magazine dyno tested a 340 and a 383. Note that this was not the magnum 383, just the 383 four barrel motor that had a milder cam than the 340. Both made the same 280 hp stock. Modified, the 383 made more with similar cam, intake, carb etc.

A 383 does have a few more cubes than either a 340 or 360.