smallaxe is right you can trim those. I have properties with arbs. that get trimmed every year. Looks like and i'm saying this without being on the property and seeing them up close but you could cut off 6-8'' of the top and 4-6'' off each side. Thats what it looks like from the pictures but you would have to make that call when you look at them and see where the dead zone is. Or you can rip them out and replace them with something that won't grow as big. Your choice.