Well, the '63 850 (rego SA 174-171) was traded on a 1968 Mini Deluxe (rego SA RSN-278). Great car that.
We did lots of bush trips and camping in it and had the seats converted to lay back for sleeping. The blow-up mattress over the seats had a hole in it to accommodate the gear stick.
We also messed about with it a bit to try and make it better in the bush. One mod was to fit 12"Hilman Imp wheels to the front to give some better ground clearance. That worked well in conjunction with replacing the balls in the end of the front hydrolastic units with threaded versions to allow quick height adjustment of the front end. Lowering the balls by 1/8th of an inch raised the suspension by 1".
Then for one trip we bolted a second 12"wheel to the outside of the first to give us dual wheels on the front. I thought that would be good for sand. It wasn't. And it was a pig to steer on any rough stuff.
This trip was Easter 1970.
We drove via Marree to Coward Springs on the Oodnadatta Track. That is the old Coward Springs railway siding with the Ghan train going past. Looks nothing like this now and the commercial camp ground there is covered in trees watered from the artesian spring.
You can see the 12" front wheels.

There were 3 of us on board for this trip. The rear seat was taken out and the back seat passenger sat on the bedding.
We called into see the policeman at Marree to tell him we wanted to drive west from Coward Springs to Billa Kalina homestead. He told us we were mad and he would not let us go, but his dolly-bird wife convinced him to change his mind because she wanted to go into that country to find us later. He eventually agreed. The deal was we needed to call into the Kingoonya Police Station when we got there and if he had not heard from us in 4 days, he would come looking. We had absolutely no form of communication.
These pics are a little way west of Coward Springs.


The track we headed west on soon petered out and we proceeded on the southern side of the Margaret River by compass bearing until we found station tracks again as we got closer to Billa Kalina. It was a tough drive, particularly crossing some of the dry sandy creeks along the way. The Greenfields at Billa Kalina did not believe we had driven from Coward Springs until we described some of the features we had seen. When they saw the Mini, they went into denial I think.
We tried to repeat this drive in reverse exactly 25 years later in a 4WD and failed. There was still no track but there were also extra fences and some of it was wet.
Must try again sometime in the Moke?

Cheers,
Peter