Coach in the 764 is pretty much the standard DL Coach....tight.
However, First in the 764 is truly pathetic. The F seats have a 39" pitch and if the person in front of you reclines, they are basically in your lap.
Don''t get me wrong, the 764 is good for high-density short haul flights, but for long-haul service, it''s not very comfortable. Nor is it competitive with the likes of CO which uses BusinessFirst on their flights to Hawaii.