It's fugly, but in it's day that was a top of the line ride. Late 40's -early 50's styling just doesn't appeal to me very much, especially the Mopars.
Did Imperial use the Chrysler or the Desoto Hemi, or did they have their own version? I know the Chrysler, Desoto, and Dodge Hemi all look a lot alike, but share few parts. I don't remember if Imperial had their own version or not. Imperial was a stand alone brand just like Chrysler and Desoto and Dodge. They didn't merge them into Chrysler until the late 60's IIRC, even though they were owned by Chrysler the whole time.