Chevrolet Master 1933 engine sound, help.

Hi, Could you people please help me out here. This is my Chevy Master 1933 with the original straight six stovebolt engine. I'm not very good with engines and would like to hear what you think of the sound you hear. Some people I know tells me that this engine is in need of a renovation or that I should think of a engine swap. They think that the crankshaft is broken and stuff. Can you hear if they are correct?