You did not mention which airline. If it is United, you will not be able to book coach bulkhead ahead of time, even if 1P or 1K. They save it for families with babies on day of flight. When check in you may be able to get it though. If you can it is pretty nice, except for the middle aisle seats, the door to business class is right in front of them and you tend to get bumped into a lot.