"I know the cowl hood on a 68 Camaro is a touchy subject around there but I seen 2 302 Z28 cars come through Barret-Jackson with a factory cowl so we know they do exist." They did NOT come out of the factory with cowl induction z/28 hoods until '69 (67 and 68 had a flat hood or ss hood). I don't even believe they made ss/rs or rs/z28 cars either and I've seen those too. Did you see the build sheets? I think they can reproduce those too. Just sayin... I was born in 58 and have owned a 67rs, 68, and 69 Camaro.
http://www.carcraft.com/featuredvehi.../photo_13.html