So I checked and Yamato uses thin pegs for the hands and Bandai uses a thick ball joint. No go unless someone wants to file their ball peg down to fit. I ain’t doing it, lol! I’m surprised no one has printed hands or have they?
edit: now that I think about it, maybe 1/60 hands would work? Anything is better than the tiny skeleton hands on the 1/48 and VF-0s