Some 340 Love

One thing worth mentioning is Mopar made 2 versions of the 340 which had 2 HP ratings. I'm no expert in GM or Ford, but I know that Chevy was notorious for 3 or more power ranges for the same engine.

For example, a 396 chevy (pre-72) came in 206hp, 260, 265hp, 300hp, 325hp, 350hp, 360hp, 375hp, 425hp