feelers on a 413

my neighbor has some mopar engines and such he,s not sure of complete list yet but knows he has a 413 from a 64 or 65 imperial he thinks he,s got some other big blocks and small blocks will have a complete list and some pics after next weekend some body give us some ideals of what this stuff might be worth,chat room says around 400 on the 413 thx in advance for your input.