I was wrong above. It was apparently held at the West 8 Mile [[Detroit Artillery) Armory from in the late '50s until it moved to Cobo in the early '60s. Here is a brief history of the auto show, with a picture of it at the Armory. Interestingly, no mention of Masonic.
http://blog.dodge.com/events/the-det...ugh-the-years/
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