Anita and Joe's car is a 1957 Dodge Custom Royal Lancer convertible.
Dan Mathews' patrol car is a 1957 Buick Special 2 door Sedan-Model 48. Equipped with a 364 cu.in. "Fireball" V8 engine, it developed 250hp with 380 lbs-ft of Torque. Its original Sticker Price was $2596.00
In the scene where Joe Varnum is flagging down a ride, the background has a parked vehicle on the right. The same background appears again as Matthew's is leaving with the girl after her arrest.