During final chase scene the Chevrolet Malibu police cruiser goes from a '79 to an '80 and back again. The SWAT van is also a Chevy Step Van until it goes in the drink - then it becomes an International Harvester Metro Van.
Despite taking place in New York City, one scene takes place beneath an Atchison, Topeka and Santa Fe Railway bridge. The AT&SF never had railroad lines in the Eastern United States, in fact they never had lines anywhere east of Chicago.
It is explained that the severe beating/stabbing Cordell received while in prison caused him to lose "all higher brain function(s)". How does this make him impervious to gunshots and other injuries? This might make him unable to feel pain, but any injuries should eventually take their toll.