The story is taking place in the early 1980s (based on a real robbery that occurred in 1982) but the Armored vehicles used in the film are Ford F chassis that are too new for the time, having been 1995 or newer Fords.
Detective James Ransome is watching Chris and Eddie in the car park following the robbery, he's wearing a late model G Shock watch. G Shocks were invented in 1983 but the style of watch was square until 1990.
(at around 55 mins) Chris is watching the guards leave on the monitors, the clock above shows 8:06. He then hears the boys breaking into the cash house through the roof, he gets up from his chair, looks back at the monitors, the clock now shows 8:04.
While Chris, Eddie, Mike, and Jimmy are sitting in the diner booth, Jimmy pushes a plate of potatoes toward Eddie, telling him to eat them. Seconds later, after the cut, the plate is back in front of Jimmy.
The size of the suitcase supposedly holding eight million dollars for the Columbians is far too small. It would take 8 suitcases the size of a Halliburton bag to hold 8 million dollars in hundred dollar bills.
The New York State License plate displayed on the Firebird was not released by the New York State Department of Motor Vehicles until 2010. To be accurate for the period it should have been a solid yellow license plate with blue lettering. The plate featured in the movie is known as the Nostalgia series.