Looking for advice on a '71 Demon

What rear end is in it? I would give the body a good going over. Some can look great while hiding problems underneath as you are likely already aware. If your paying a high price for it I would posts some detailed picture of it so those more versed in demons can pick it apart so you know what you are buying. I know some put a high value on 340's but I would want to see the heads off and or pan pulled before paying a high price for the package deal.