Bulkhead is somewhat superfluous on the 764s, with the lie-flat configuration.
The seating across is 1 2 1.
The window/aisle seats--like A--the odd numbered rows have the seat against the window and the console on the aisle. The even numbered seats have the console against the window and the seat on the aisle.
I flew ATL to LHR last month in 3A and slept six hours of the eight hour flight. The return was very comfortable and relaxing as well with lots of great movie choices--I watched three. I was very happy with the BE 764 configuration.