I understand with the older American cars, it is a lot easier for forgers to switch VINs. I've heard stories of people who would buy old Shelby Mustang tags for $1-2K and forgers would then convert regular Mustang fastbacks into a Shelby GT350s and get away with it. Thankfully, with 240Zs, at least there are 4 places where the VIN is located and the engine has its own specific serial number (unlike those '60s muscle cars) I also think that the VIN on the firewall would be very difficult to change. With the old American muscle cars, assuming each car is in similar condition, a '65 Shelby GT350 is going to be worth at least 3 to 4 times as much as a '65 Mustang fastback or a '65 GTO is going to worth a lot more than a LeMans 2-door hardtop or convertible,etc. With the early Z's values rising considerably in recent years, there could be more problems like Ddezso just went through, but let's hope not.