Bad Idea unless you split it down the middle so as to get a top and bottom. You're not going to get an unbalanced guitar.Thats nonsense.How heavy is a guitar neck with tuners? If anything it will balance it.I dont really think you have a snowballs chance in hell to get it right but if you did you would gain better tone,more sustain and of course less weight.
Dont do it. If you're going to go through all the trouble of splitting it just make a new body instead. I hope you're patient and creative .