Detroit Speed 1966 Fastback Mustang Test Car with a Boss 302 Roush Yates engine and DSE Aluma-Frame front suspension and the QUADRALink™ rear suspension. This is the official &quot;Test Car&quot; for Detroit Speed&#x27;s line of Mustang products for the 1964.5-1970 Mustangs. It is equipped with the DSE Aluma-Frame front suspension, subframe connectors, deep tubs as well as the Mustang QUADRALink™ rear suspension.   http://detroitspeed.com/Projects/DSE-1966-Mustang/DSE-1966-Mustang-pg-1.html