The Ajax Motors Co. of Seattle, Washington, produced a car available in three different wheelbase lengths. It sported a 6-cylinder engine that was available in either sleeve-valve or conventional poppet form, and could be changed "from one to the other at comparatively little expense."
References
G. N. Georgano, "Ajax", in G.N. Georgano, ed., The Complete Encyclopedia of Motorcars 1885-1968 (New York: E.P. Dutton and Co., 1974), pp.30.
