my bad for the delay just know if you follow this, it'll likely mess up weight painting, and topology a bit, if you want both as once object, first thing to do is merge into one object, after that depending on if you already have the head and neck lined up, you're gonna wanna start leveling them out, to where they both aren't intersecting, [easiest way of doing this in my opinion was using face project and G+X (or whatever ur axis may be for height) and leveling each vertex to the same height as the bottom of the head)]
[image: image_2026-10-09_200640618.png]
after you align it, it should look something similar to this:
[image: image_2026-10-09_201129811.png]
after you have something similar, start moving vertex for the head into the same position, highly recommend vertex snapping (if you have more vertices on the neck than the head, just subdivide the edges, and triangulate them, note that some of the faces might need to be deleted) it should look something similar to this:
[image: image_2026-10-09_202156523.png]
after so, select all the faces connecting the 2 sides:
[image: image_2026-10-09_202337284.png]
then use M to merge by distance, and voila it's one piece, althought this will definite mess up some stuff if you're already done with weight painting (it'll look something like this) [image: image_2026-10-09_202922135.png]
