What is the relationship between Brill, Gillig, and Crown?
I do not know the total history. “ACF” was “American Car and Foundry”. They and J.G. Brill made rail cars, trolleys, etc. As far as I know, they never had a relationship with Gillig or Crown. But like most things, there is lots I do not know. (Slightly) more info at “http://www.acfindustries.com/acf_information/history.asp” Crown operated from the Los Angeles area until about 1990. I believe that Gillig may have purchased some of their assets when they folded. Gillig continuse to operate from the San Francisco area. Most school buses are light-duty or medium-duty construction, largely because the heavy-duty buses cost a lot more and it is hard to justify the up-front expense for something that is used only a few hours a day, and a lighter bus may get better fuel economy, too.