A well earned point for nicanary!
According to my source, the late Peter Stevenson, builder of several cyclekarts, was inspired to create this one by a German Schuco tin toy which was based on the Mercedes W25 from the mid-30s. It also says that the cyclekart's name is spelt "Brannan Special", in honour of the car driven by Clark Gable's pilot character (Mike Brannan) in the 1950 film "To Please a Lady", which it also resembles. That car was a 1948 Don Lee-bodied Kurtis.
I will post the unmodified picture later.