Paint inside of valve covers?

You definitely need need baffles unless you don't care if your engine looks like crap in 500 miles. When I bought my Cuda it had new Mopar perf. valve covers on it with no baffles and every time I drove it the area around the breather would be oiled up. New engine too with no blow-by. I made a set of baffles and installed them and it stays clean now.