Transmogrification and BoAs

So I've come to understand the following about Transmogrification.

We can change the look of a piece of gear into anything we have, can equip, and is of the same armor class. Okay.
Weapons can be transmog'd to only look like other weapons of the same weapon type- barring ranged, they can become any other ranged.
Can't transmog into Legendaries.

But, so far, I've seen nothing about Heirloom gear. Now, granted, the Bloodied Arcanite Reaper looks nice and all, but it's tiring to see it from 1-80. Will we be able to Transmogrify our BoAs to give those of us who enjoy them a nice change of pace from the same old visuals?