I've searched on this site, and it looks like there are varying posts as far as the correct radiator gloss. For a 1968 Olds Cutlass S, is the radiator tank and fins supposed to be gloss black, or semi-gloss black? In the "How To Restore Your Muscle Car" book, it calls for gloss black, and another document I found called GM A Body Paint Info, also called for gloss black. Does anyone know for sure, which is correct?