When did Kelsey Hayes vacate the plants on McGraw and Military? Did the plant in Romulus replace one, or both, of them, or was it an addition?

Around 51, Packard bought a plant on Mt Elliott to make forgings for it's J-47 plant in Utica. The source material I have says it was 325,000 sq ft, located at 8500 Mt Elliott and had been bought from "a steel company". 8500 Mt Elliott is a vacant lot now, and the block looks too small for 325,000 sq ft. The building next door at 8650, now Monarch Steel, R C Mahon in the 40s, looks to be the right size and used by companies dealing in steel. Is 8650 actually the building Packard bought?

The route for what is now the Edsel Ford Expressway had been planned to follow Harper for years. Early drafts of the right of way were published in Feb 41. When the Expressway was cut through in the mid 50s, it narrowly missed Packard building 22, and took off about 100,000 sqft of building 84/84A, the two new buildings built during the war for the Merlin program. Did Packard realise it was encroaching on the Expressway right of way when those buildings were built?

Thanks!