Nope, do you? Any basis for your guess?
seriously, I thought you were joking on your first post, but in case you were not....

If you are referring to this emblem (picture below). A 1966 emblem only used on Hemi Plymouths (no Dodges) to identify that they had a 426 Hemi under the hood, and only used for the first half of the year because few people "got it".

Then used/connected to later year (Dodge & Plymouths) to identify big block engines for some type of special High Performance usage? No, I don't see that as being very likely at all..

My opinion: Any 440 Blocks stamped HP meant nothing more than "High Performance Application", and "2" for Second Shift. That's all I make of it.