You should consider playing with the suspension settings, namely toe, instead of power steering to reduce low speed steering effort required on the early coupes. I have near zero toe-in on the front, and many people have commented that my car's low speed steering effort feels boosted. When I climb into a car with the stock alignment, I 'feel your pain'. Big difference.
It should be doable, I just don't know anyone who has done it. I know the parts are very expensive so if possible you'd probably want to get them from a salvage yard, otherwise you are looking at a 5-digit bill. If you go through with it, please do a write-up on what is involved!
Chris explain to me how REAR Toe might affect steering effort. I can understand changing the front Toe settings to reduce steering effort, but as far as I understand the Rear Toe-IN is dialed in to keep the car's rear end planted under cornering (along with the Negative Camber)
Wouldnt dialing out the Toe-in on the rear cause the car to get a little tail happy in the corners?
Why would anyone not want the power steering? I drove my car with PS and without PS when the computer went out. I have driven a '91 NSX and a Zenardi. At low speed it makes a huge difference but over 30mph or so the steering in all the cars felt almost identical.
BTW. A little off topic.. I think the clutch changed in 2000. The clutch in the Zenardi was VERY different from my 2000-T. In the Zenardi it took much more effort to push the peddle and the range that the clutch engaged in was very short. It was a stock clutch.