It's the set up that makes them drive well, not the steering box. Landrover could get Range-rovers, which are just a flash truck, to drive better than most 2 wheel drive cars, with a without a rack for years.
Fitt factory steer on a LHD car, Falcon XF variable ratio box on RHD, then give it it +5 - +8 degs of caster.
Regardless of how you turn the wheels, its what they do that's important. What you need to do is shorten the caster bush spacer tubes by 1/8", this makes the lower arm more stable, give it about 2.5mm toe in, and as much caster you can get without the wheels clipping the front edge of the front fender. To do this you'll need some shim in the front bolt of the top arm, you'll never get it with just the caster bar threads, most wheel alignment blokes won't want to to do it for you, because most of them are clueless, but caster is what makes them steer well, you'll want to replace the front bolt in the top arm with some longer ones to ensure you can get the shims in. Modern cars steer well not because of racks but because of caster. Morris minors steer like crap and they have rack as do many old pommy cars, Caster is the key. Some racks make Mustangs worse, a Boss should have a hi ratio box so you just need a PS drag link and ram etc to convert it.
So on a road car align it like this
2mm - 2.5mm toe
1/2 negative deg camber
and as much positve caster as you can get. To get big caster you may need 3/8" of shim
This how they used to get old Falcons around Bathurst but with way more camber
