No, its not really workable.
The issue is more than the ability to plug the unit in (slightly different sizes). The issue is the antennas the way 802.11ac works requires waveform shaping to gain the throughput your systems antennas can't offer this as they are designed to support different bands.
Testing has proven there is no benefit swapping it out (in fact it tested out worse throughput) '''[http://techctrlr.com/features/2013/7/3/it-works-so-why-is-80211ac-not-in-the-retina-macbook-pro|Techctrir - Does it work?]'''