Would it be possible to make a port for ReIndev? It's another retrofork similar to BTA and NSSS. It doesn't use the same package structure as vanilla b1.7.3

Indev doesn't even have multiplayer? Adding it would only affect the inventory screen and would basically involve rewriting the entire player renderer.

ReIndev isnt a mod for indev, thats just its name. ReIndev is a mod for b1.7.3. You can find videos of it on youtube

Thought I would add an update to this post; with the mixin based mod loader for ReIndev, "FoxLoader", a port of Ears is probably easier than ever now.