Rolled grille opening lip versus flat grille opening lip. What decided which car got which? CSX3004[1sr 427 S/C], has a flat bottom lip, as does CSX3015[Super Snake in its 'black' configuration]. The red CSX3123, and Bruce Canepa's dark blue CSX3360, both have a 'rolled' bottom lip. I thought initially it might be that S/C's all got the flat lip, but found a few photos of bubble fendered, no hood scoop, no side pipe or roll bar cars with flat lip, and vice versa - flare fendered C/S's with a rolled lip. Can anybody please clear this up for me?