It looks like early-mid 80's vintage Arrow. With that canopy cab, I doubt that body is original (the jump seats aren't accessible). I would guess that it's an ex-pumper chassis, lengthened to accommodate the box body.
John I.
Fire/EMS Dispatcher / EMT-B
Fire Apparatus Photographer / Hobbyist
www.fireapparatusphotos.com
www.flickr.com/image7801
Nikon D5600 (retired: Nikon D90) / Nikkor 18-55mm f3.5-5.6 / Nikkor 35mm f/1.8
Fire/EMS Dispatcher / EMT-B
Fire Apparatus Photographer / Hobbyist
www.fireapparatusphotos.com
www.flickr.com/image7801
Nikon D5600 (retired: Nikon D90) / Nikkor 18-55mm f3.5-5.6 / Nikkor 35mm f/1.8