Originally Posted by yvr76

Not sure. Would definitely have to maintain 2 cabins. Here's is CX's config, almost identical to AC's new J product.
http://www.seatguru.com/airlines/Cat...77-300ER_C.php

Although AC will have 1 less row of PY, Y would have a 31" pitch and 10 abreast, and they might remove a lav or two. AC's previous statements indicated a net increase of 51 seats.

Hard to know how it all adds up.

update - https://www.flyertalk.com/forum/23802946-post1132.html