I spent 17 years in that other large foundry in Indy, the IH / Navistar foundry on the SE side of town. I was active with AFS back in those days. Went on several tours of the Chrysler Harding Street Foundry. I remember back in the 80’s that Chrysler foundry put in a rather unique green sand molding process called ‘Impact Molding’. Was said to be state of the art molding technology back then.