Are you running some type of IFS system? Fitting what is basically an electrically-boosted rack & pinion system to a straight axle is a pretty difficult situation, with a lot of pitfalls to the process.
Some of the OEM electric-steer systems I've seen on warranty claim inspections are under the dash, and basically boost the torque the driver applies to the steering column. It might be simpler to adapt something like that. I don't know if any computer assist is involved, but it wouldn't surprise me if it is- - - -virtually everything has a computer interface these days!
Jerry
