I wasn't aware that Ford owned that plant at 9 & Mound prior to Chevrolet.
J&L acquired the Rotary Electric Steel plant in 1957. The plant was located at 21400 Mound Rd., about one-third mile north of Eight Mile Rd. [[across from Elza Street). [source] [1933 aerial photo] [1949 aerial photo]. The Dodge truck plant paint shop now occupies that site [Google maps].
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