its something that would need a lot of planning,somebody would need to dive it to see if there was anything better than just shells,then the possibility of pumping it out or some kind of grapple/magnet to get at them,then a machine that could reach them or which has the strength to pull them out.go to google,type in aboutmyplace which is all 1 word,type in a postcode where there is a yard which you suspect may contain cars which are of interest and you will get an aerial view of the property,i just found a yard which has some 80's fords in it.every town has a yard that supposedly has old cars in it!there was 1 opened up in wales last year after shutting in the 80's!