An engine question...

Dodge was the Red Ram and Super Red Ram.
Chrysler Firepower.
Imperial was Imperial. Said so right on the valve covers. Although they were the Firepower.
Desoto was Firedome.
Dodge medium duty trucks used the Firepower but called them Power Giant. They also used The Dodge Hemis and called them Super Red Ram.
Industrial and agriculture engines were Firepower but had "Industrial" in cursive script on the valve covers.

There may well have been others, but that's all I know about.

Here. Let Bob Walker educate us.

http://www.hothemiheads.com/hemi_info/hemi_engine_id.html

Notice though he leaves out the industrial engines. They had their very own Name as evidenced by their own valve covers. They pop up on fleabay all the time. Also notice the truck engines are left out.