I have heard that the Yosemite car had the dome offset for use on a cable incline, but wouldn't swear to it.
From the Densmore site: "They were unstable, top heavy, prone to leaks, and limited in capacity by the eight-foot width of the flatcar. " These were standard gauge, but the flatcars were the same width as the D&RGW's narrow gauge cars of the 1880s.