A Michigan collector’s wanted ad for any Plymouth Barracuda, in any condition, reflects just how scarce genuine survivors have become since Plymouth’s 1970 redesign turned the car into one of the era’s most sought-after E-body muscle cars. That redesign also produced the one-year-only AAR ‘Cuda, a homologation special built for Trans-Am racing that still drives collector demand today. Read on to find out what makes the 1970 model year so different from everything that came before it.