Show them this-taken from the Shelby American Automobile Club website:
"SAAC was originally set up to cater to the cars Carroll Shelby created and raced — Cobras, GT350s, GT500s and Ford GTs — but since its inception the club has broadened its parameters to accept virtually all high performance Ford-powered cars including Tigers, Mangustas and Panteras, Boss 302, 351 and 429 Mustangs, AC Mk IVs, Cobra 4000s, Mustangs of every year including the latest generation of Shelby GTs and GT500s, Griffiths, Italias, Galaxies, Fairlanes, Comets and yes—even Cobra kit cars. While SAAC does not accord "equal" status to all these other vehicles, it nonetheless welcomes them (and their owners) into the club. The reason for this is simple: SAAC has no ownership requirements, so in that sense everyone is welcome to participate"
And yes Shelby owned a Tiger......