Definately going to fit something like what's available here http://www.ultimatepowersteering.com.au/categories/electric-power-steering/epas-systemsto the Z31 project, what sort of systems have the more adventurous fitted to their Z cars? The advantages for me will be more forward space for the engine's sump against the rack, no PS oil cooling radiator, no PS pump to complicate the engine accessories arrangement, no hoses and so on.
I was going to check out electric systems at the wreckers but I like the idea of having the motor on the steering shaft, are there any OE ones like that?