Well, after asking about the play in the steering rack on here I went out & bought a rack end. Then rego inspection came up before I fitted it, and the guy checked the passenger's side, then the drivers side (which was the loose one) then went back to the passenger's again and said I better replace both of them. So I bought the other one and we fitted them yesterday. They were shorter in contruction than the originals, so setting the threads the same gave an inch of toe-out, and it was out with the tape-measure for an alignment.
We marked the tyres at 165mm off the ground with White-out pen, the height a tape can clear under the car, then took a piece of alloy section each and measured front and back of the wheels. She set them to 2mm toe-in, but we can sort that later at a wheel alignment shop. The car feels much more attached to the road through the steering now, not so floaty, a lot nicer! A tape over the rear wheels in the same manner showed we have 12mm wider track at the front than the rear. That will be the Corona LCAs.
I took it down to Sydney for a day and over the 500km it ran at 6.9L/100km, so the SUs are running true to form- Ok around town at 10L/100km, but cheap to run on open-road cruise at 100kph. Now I can get back to that cold-air tube and airbox vent!