AMSTED Industries Inc., Chicago, hired National City to run $17 million in an enhanced Lehman Aggregate index fund for the $120 million pension plan, said Matt Hower, treasurer. National City replaced Morgan Stanley, which was terminated for the performance of a similar portfolio, Mr. Hower said. Morgan Stanley still runs about $15 million in international equities for the plan. No consultant was used. Andrea Slattery, spokeswoman for Morgan Stanley, declined comment.