Compare the design with the Canadian Ford and Chevrolet 1935 designs:
http://www.rcaca.org/AFV-1935-Armd-Cars.htm
Very similar in concept!
I was listening to the radio in September 1967 when Sverige switched over during the night to driving on the right. I was sure it was 6 September but I know I am a few days out..I was 12 at the time. It is no surprise that the engine was a lhd and not rhd engine..all Chevrolets to my knowledge that were imported by GM, Stockholm, were lhd.
I am realy glad that I resolved another mystery..that's what I do!