This from Mike Summa:

Fort TBT-Here is a newspaper article about the new North Palos Squad 6605.  Built on a Spartan Gladiator chassis for $130,000.000. The second photo is from an Alsip parade.  I am sorry I do not know the manufacturer.  If anyone knows, please submit. Mike Summa
Note from – the body was built by Frontline.
North Palos FPD Squad 805 - Spartan Gladiator/Frontline

Mike Summa photo

North Palos FPD Squad 6605

click the newspaper article for a larger copy