From Lifelineambulance.com:

Reference #: 4609
Model: Superliner Type I
Dealer: Jefferson Fire & Safety
Module Size: 171″
Headroom: 72″
Chassis Make: F-Series
Chassis Type: F550
Wheel: 4WD
Air Ride: Liquid Spring
new ambulance interior

Life Line Emergency Vehicle photo

Life Line Type I ambulance

Life Line Emergency Vehicle photo

Life Line Type I ambulance

Life Line Emergency Vehicle photo

thanks Martin