Let's not forget about all the turbo-4 Dodges he built during the 80's!
You are correct, and it was later said that it was a mistake. The omni, the shadow, etc. On a positive note, the ONLY person to put profanity on a car and get away with it. GLH (Goes Like Hell).
AGAIN…I am not happy with having a 4 cylinder Mustang, and being how Shelby had NOTHING to do with any 4 cylinder Mustang, I don't see him remotely having anything to do with one now. I could be wrong if he were still alive. I'll take my chances as I (and others) knew his formula. Light weight, huge power. The "supposed" weight of the 2015 was supposed to be at least a couple of hundred pounds lighter, and it is not. So to not only put a 4 cylinder in a Mustang, but in one that weighs more…that would be completely against his formula, as well as tons of others that common sense says, lighter weight and more power accomplishes more performance wise.