I've been in emergency services for 33 years and have driven many different vehicles and apparatus. I have never seen a Pontiac in use in support of fire or law enforcement agencies in all those years. Lot'* of GM, Ford and Dodges though.
The best patrol car I ever drove was the 1979 Malibu with the 9C1 police package - heavy sway bars, 350, tranny cooler, etc. The car was hot! The worst patrol car was the 1988 Dodge Diplomat with police package....the 318 was okay and the transmission was strong, but the sway package and suspension was mushy. My partner rolled one at 30 mph on a curve...they do hold up well while on their roof.