Isidro Arellano thought he'd found a good thing when recruiters showed up at Mexico's Universidad Tecnologica de Torreon looking for engineers interested in career-enhancing jobs in the auto industry in the U.S. South.What the 26-year-old said he got instead was a job lugging steering columns and installing bumpers, logging 60-hour-plus weeks at a Kia assembly line in West Point, Ga.