CHICAGO — Ford is spending $50 million and creating 450 full-time jobs to handle increased demand for new versions of the Ford Explorer and Lincoln Aviator.

The auto maker says it will upgrade a 200,000-square-foot building near its Chicago Assembly Plant where it now modifies Explorers into versions used by law enforcement.

Painted bodies will be sent from the assembly plant to the upgraded building, where workers will put together the Explorer hybrid, Aviator plug-in hybrid and police Explorers.

About 450 temporary jobs at the assembly and stamping plants will become full-time; more temporary workers will be hired. The investment is in addition to plans announced in February to spend $1 billion and add 500 jobs in Chicago.