The head is fine. Clean it first... and then use a small (jeweler's) file to clean any sharp edges off of the dents. Don't get crazy with a big file, or die grinder.... just tale the sharp edged off the dents.
With that said... I don't think you should bother with a "Top end" rebuild. If the crank is old... it's going to eat itself quickly, and it will be wasted $$$.