Pommy Corty's (import Pom 2.3 V6 TE and TF 2.3 V6's on this side of the ditch) have a power steering option. The 1982-1990 Hyundai Stella Prima power steering system is exactly the same systemm, along with an adjustable version of the pre 1977 Cortina suspension, and fits Oz TC/TD's.
Most Cotina sixes of the TF era got the TRW power rack you have. They are often used in LH-UC Torana power steering conversions, CRS used to do a few of 'em for the V8 guys.
All Cortina set-ups, regardless of type, are very light, but has 3.1 turns lock to lock, rather than 4.2 turns. With a tight turning circle 2 meters narrower than the Falcon, and a set of wider 225 feet, its a winner in my book!