That post will work but you will need to rework either the ball stud on the neck or the head's neck hole opening. As was said those heads can be a bit softer and you don't want to rip/tear the opening. I suggest taking a pair of small, sharp, pointed edge scissors. Place the point into the neck hole, DO NOT PUSH THE SCISSOR IN ALL THE WAY, just as far as it goes then give atwist of the blade in a full 360. You should see it "shave" the opening wider. Powder the neck ball stud and see if it goes in, if not retry the procedure. I have done this with many heads and never had a problem. you should make sure that this is the neck/body that you definitely want the head on , because taking it back off can result in damage if you change your mind.