[1] 1966 profit reports were based on several OTL articles: “Ford’s Profit Down 12 Pct.”, Detroit News, February 3, 1967; “GM’s Profits, Sales Retreat from Peaks”, Detroit News, February 1, 1967; “Stockholders hear AMC’s Woes”, Detroit News, February 2, 1967 (I could find no report from Chrysler). I have arbitrarily halved the profits of Ford and GM for the fourth quarter, but increased AMC profits by $10 million.
[2] Interestingly, relatively few auto factories were located in the (evacuated) Downriver area at the time. Even in the 1960s, the auto industry was fairly decentralized, with plants across the United States (albeit concentrated in Michigan and Ohio). Even in the Detroit area, most plants were located in the city proper, Dearborn (barely outside the evacuation zone), and northern suburbs:
https://detroitography.com/2014/04/18/map-of-detroit-auto-industry-1960/
See also:
https://en.wikipedia.org/wiki/List_of_General_Motors_factories ,
https://en.wikipedia.org/wiki/List_of_Ford_factories ,
https://en.wikipedia.org/wiki/List_of_Chrysler_factories ,
https://en.wikipedia.org/wiki/American_Motors_Corporation#Facilities
[3]
https://en.wikipedia.org/wiki/McLouth_Steel