[Rebel1]

By way of comment:
You'll notice from the pic on that Citroen Classic link that the Barina unit is quite large and designed to be fitted under the dash. Cobras usually have little room under the dash with pedal boxes etc. competing for room.

The unit fitted to the Mongrel cobra sits in the engine bay right in front of the foot box and is a very compact unit which can be oriented in whatever manner suits the steering geometry,

The steering column RMC supplied was a shortened Colt column with (if I remember correctly) a 3/4 X 36 spline end. Flaming river steering uni's and shafts were used to install the EPAS between the end of the steering column and the holden manual steering rack normally fitted to RMC's and G-force cobra kits. The owner of the car was running 6 degrees of caster so it was quite heavy to steer until the EPAS was fitted.

The mongrel also uses live side pipes off a 302 windsor based engine so that gives you an idea of how littel room was available to fit the EPAS on the right hand side of the engine bay.

EDIT: to add more info