I have a 79 RX7 and the steering is really really stiff one it I mean i try and turn it and my arms shake now this is my first non power steering car But it just seems to stiff. Now I replaced the ball joints and the tierod ends and the improvement is minimal, I was also told that the steering box in it is not stock and is not designed for sports. Is it possible to put a Totally diffrent box in it? and could it be the problem?

 

what knd of box is it?? is it box or ball????