I used the wayback machine to retrieve some of the photos and text from the Hemmings ad, I hope you don't mind
Duesenberg early 1930s AAA Dreyer Sprint Car, originally powered by a Rochester Duesenberg Walking Beam engine. All original, history known from new. Built by Pop Dreyer for racing great Don Moore who in the 1920s drove for the Kline Kar team that used Duesenberg and RD engines in their cars. Don installed the WB engine himself. Walking Beam engine blew up in the 1940s and was discarded. Was replaced with the current 1941 Ford flathead six engine. Only WB engine race car known to exist. Locate a RD engine and install or display with the car. Shown Amelia Island Concours 2010. Lots of original photos, history.