Here is what it looks/looked like under the valve cover on my 78 chevy k20 with a 350 sbc. I know nothing about the maintenance history of the vehicle but im sure it was not good. It was mostly a yard plow truck I think. I bought it with dirty oil and a trans where the fluid was not registering on the dipstick and all but one leaf spring broken on the passenger side rear axle. I have put at least 3000 miles on the truck since i bought it and all seems well. The pics are of a rocker before and after cleaning and under the valve cover before cleaning and while cleaning. I took the pics with my phone so they are not the best but you get the idea. The other side looks the same.