Answer to: Can I install the MBA '13s AirPort card in the '12 model?I was able to install the mid 2013-early 2014 wifi/bluetooth board into a late 2010 13" Macbook air. Bluetooth and Wifi are still working. I have yet to see what the performance gains are. I was encouraged by the fellow who tried it here: How can extend airport antennas Some snipping of things is required to make the cables just barely reach. Cannot screw the card into the motherboard.
Answer to: How can extend airport antennasLike Jordan, I was able to re route the cables to successfully install the newer wifi AC card in my late 2010 13" Macbook Air. Snipping the antenna cable from the hinge part was the scariest thing, but after that I had _just_ barely enough cable to plug into the card. The card is of course too long to screw in. I'm happy. Have yet to test with a wireless AC router to see the performance boost I get.