Got my block and heads back today. Things look good. Engine is bored .30 over, heads are fresh and resurfaced. I was checking over the combustion chamber edges on my 4V heads, they have sharp edges with a little roughness around the intake valves (just where the combustion chamber meet the head surface) . It appears on all intake valve areas. I was reading over Tom Monroes book on rebuiling the Cleveland and i notice the same thing on some pictures. Would it be wise to lightly file these burrs and sharp edges down?