Ha, ha, most antagonists for Frank and Adam are either mobsters or just people committing the occasional crime, a stick-up or vandalism. Okay, also blackmail and murder!

As far as cars go, think early '60s cars with tail fins. ☺️ A lot of Plymouths, Mercurys, Chevys, Fords, Chryslers and Cadillacs. Not many foreign cars driven during this era, and the Mustang debuted in '64, I think.