An engine question...

Well see, I was wondering if ANY had a designation number or letter.....

I know the following on them,

Dodge was the Red Ram.
Chrysler was the Fire Power.
Desoto was the Fire Dome.
Imperial was the Fire Power (just like Chrysler)
Plymouth DID NOT have a Hemi type head engine back then, they were strictly Poly-Head powered engines for them!

I know that none of their parts were interchangeable back then.....BUT I had to ask if there was some sort of destination on these engines.....

Thanks guys.......