I can't imagine why anyone would want a 4 cylinder Camaro. I can see wanting a 4 cylinder in a car designed for a 4 cylinder engine, but I really don't see the point in bastardizing a car made for muscle.
A lot of posters seem to think everyone against the 4 cylinder Camaro are neanderthals. We're really pragmatists. We know what introducing a 4 cylinder means for V8 enthusiasts; watered-down performance and bullshit.
And yes, it's been done before. It wasn't good.