several 426 Hemi's burried

Guy told me this morning his dad owned a junk yard several years ago and used to part out numerious old muscle cars, Hemi's ,Big Ford's ,etc. He said his dad went out of bussiness and they dug a hole and burried all those complete engines. They have been in the ground for about 40 years he thinks. What you guys think. Any chance of digging them up and maybe one are some of them be salvagable ?? I know its a long shot ,but ya never know.