Can't weld a fake head and a real head together?

I'm trying to weld a fake head and a new head together and then change the size, the size isn't really the problem but welding it doesn't actually work, can I get some help here?

    local fake  = real:Clone()
    fake.Parent = real.Parent
    fake.Name = 'newhead'
    real.face:Remove()
    real.Mesh:Remove()
    local w = Instance.new("Weld")
    w.Parent = real
    w.Part0 = w.Parent
    w.Part1 = fake
    real.Transparency = 1
    fake.Size = nsize   

Real is the real head whilst fake is the fake head.