[aerohead]

I found a copy of that Hemmings in Fayetteville,Arkansas,which led to a 'Forty Years of Chrysler' book which had the side-view photo of the streamlined test mule.
This car was the original 'Kamm-back',as one iteration was a perfectly vertical truncation of the boat tail.
This modified Airflow,while too 'fast' in profile nonetheless had remarkably low drag for its day.It would be a candidate for museum safekeeping.
The back resembles the Beetle very much.