I have a Chevy with a 350 looking at motor left side exhaust wet with oil/antifr on 1990 Chevrolet Camaro

It's only on the left side of motor manifold and carb are stained looks brownish in color back left corner of motor by spark plug wet with oil/antifreeze also under car .does it sound like gasket of crack block

3 answers
Oil leak, most likely valve cover gaskets. Antifreeze leak, most likely water pump. To be sure, most likely need a mechanic to look!!
AGREE WITH PUHROD BUT ALSO COULD BE HEADGASKET
Answers 1 and 2 cover all your bases!!