Hypothetical.. Who would Hiram support today?
Well, he was a progressive Republican, and the California Progressives were goo-goos - they wanted to break the hold of the Southern Pacific Railroad and the unions on California. I think he'd have like Prop 13 and most of the initiatives which were intended to limit the legislature's ability to make its seats into sinecures and to opress the population by pandering to special interests.
My guess is he'd go with Arnold. I think he'd like some of McClintock's ideas, but he wouldn't have any patience with the idea of losing to "stay pure" or with the social conservatism (which he'd view as mostly not within the governor's job description)... so, definitely Arnold.