Hi Jim. In reference to your deadbolt hole, there is really not going to be much support for your deadbolt. The person who took your order should have known the dimensions of the lock block inside the door and advised you that 8" would be too high to drill the lock hole. I would contact that company and express those concerns. Stanley makes a good steel skined door (unless you really need fiberglass) that has a wood lock block that is 16" in height that would handle your requirements. The best of luck to ya!!!