So just a quick question.
I know that reps get converted upon a faction change.
If I faction change from Alliance to Horde, will I lose any of the achievements that may be tied to the Alliance? Or would my account still show those as completed and done?
If I do this, I will no longer have a level 120 on the alliance side, which is making me a little nervous to actually fac change.
Appreciate any responses!
Pretty much all of the faction change effects can be found in this support article:
Wow…I totally missed that drop down box 
I feel silly. Thanks so much
Many achievements that have a faction equivalent should swap. Anything incomplete character specific achievements will be lost. If you earned a character specific faction achievement, that doesn’t have an equivalent, it still should technically remain with the character, but it won’t be visible while you are on the new faction.