Easy visual ID 383 vs. 440?
I always look to see where the i.d. tag is. The low decks have it in front and below the dist. The high decks have it front and center of the intake valley pan. Hope that makes sense. Sorry I don't have any pics.
BTW: the vast majority of 383's in big Chrysler's were 2 barrel engines where-as all 440's were 4 barrel's.