[aerohead]

Originally Posted by kach22i

The tail of the 56 Plymouth is similar to other cars of the era like the 57 Chevy.

I know this rear slope on the pick up truck below is too steep to be "aero", but the tail/fin effect is pretty novel.

Random TRANSPORTATION pictures - Page 569 - Pelican Parts Technical BBS

It looks a lot like the Kaiser 'Henry-J',which was very popular with hot-rodders.