Hey, been a while. I wanted to leave a post to i dont leave this with no solution.
I "fixed" the problem reinstalling the game with all the mods, just that this time i used the Viva New Vegas guide. So yeah, i think one of those mods from the 'Utilities' and/or 'Bug Fixes' sections may be responsible for fixing the meshes, install those mods!
But overall, it was none of my mods, at least not when i checked them.
Anyways, thanks for the help man, i leave with a better modlist and load order