This from Dan McInerney:
2012 Ford F-450/2013 Medtec Type I in service as amb 613 out of sta.1 This will replace the old 614 a 2003 Ford E-450/2004 Type III Wheeled Coach

New 2012 Ford F-450/2013 Medtec Type I for Oak park Ambulance 613. Dan McInerney photo

Oak Park has three ambulances in their downtown headquarters station. Previously they were all Type III units. Dan McInerney photo