Really you think that what you suggest might work?Wow, this is very high level mechanical engineering for my understanding capabilities!!!This would be VERY interesting if it works, I would very much like to see it, at least to be informed!!
And then, how about power steering?Do you have in your E21?They have rather heavy wheels without power steering... On the other hand I thought that power st. did not exist or at least it is something extremely rare to find, and if you talk about reducing number of wheel turns, then you speak about ending with an even more heavy steering wheel, aren't you?
Driving your E21 will be a hell without power steering...(Unless there's something that may be done, which I'm not aware of...)
Otherwise, if anybody can infor me where to find power steering to install on an E21, I am really interested!!!