Behind the muscle cars rolling through the South East Moparty Picnic is a Hollywood footnote almost nobody knows — the 1971 Hemi ‘Cuda convertible Don Johnson drove in Nash Bridges wasn’t really a ’71 at all, because Plymouth only ever built eleven or twelve of the real thing. Here’s how three modified 1970 convertibles became one of TV’s most famous muscle cars, and why Mopar loyalists still argue about it today.