Well just going by the 1969 Charger sales book, the only engine that has the title MAGNUM attached to it at all is the 440.
So as far as Dodge was concerned I guess its a 383 2Bbl or 383 4Bbl, and the R/T 's 440 MAGNUM.

I thought that if you had a non A/C 383 4Bbl in a Charger it was a Magnum, but going by the 69 sales book nope, never. Only 383 4Bbl was the 330HP one, in a Charger in 69.
And it looks as if (at least the photo in the sales book) duel snorkel, no pie tin.