Um, maybe not if he liked the performance and handling.
"shel was involved with the inline 6 Toyota 2000 GT. http://japanesenostalgiccar.com/2000gt-when-shelby-raced-the-toyotas/
At the Las Vegas factory, Shelby American while CS was alive came out with the:
Shelby CS6/8 production kit.
Shelby, along with Paxton, also designed a new variant based on the V6 Mustang. Modifications include a supercharged motor producing 350 horsepower (260 kW), 20" wheels bearing the Shelby name and the Cobra moniker on each side and the decklid, a 2" drop in suspension, Baer/Shelby 14-inch front and rear brakes, an aggressive front fascia and a dual exhaust. Shelby also created the CS8, a 4.6-liter V8 variant of the CS6. The Shelby CS6/8 was not available as a factory release. However, Shelby had made the CS6/8 kit available for purchase. But then the contract with Hertz GT-H came, and only a handful of CS6/8' were built, making them one of the rarest cars ever built by Shelby.
Then there were the turbo charged4 cyl Dodge OMNI GLHS
He also raced in lots of 6 cylinder cars: Austin Healy, Masarati, Ferrari and even 4 cylinger MGs.
CS probably understood the engineering and racing reasons for the twin turbo 6 as he was always interested in new powerplant engineering. You did know that he built a hydrogen powered Cobra working with USC engineering back in 2004. The red H2 Cobra was on display ot the Heritage Collection for years until it was sold about two years ago.
No short answers from da portagee Shelby guy!