timing--> valves?

[john]

Is there anyway to tell if the valves are bent while lookig at them? They bend at the top in the VC right? I have the head off the car. Looking at the valves, the intake valves look clean, no carbon deposits or detonation marks. The exhaust valves on the other hand are very dirty and covered in detonation. They are pretty much like sandpaper. Looking in the cylinders, it appears that cylinder 3 may have hit lightly. Cylinder 1 looks fine though. Any obvious wat to tell if they hit?