Working with the rear struts with the control arms is a real PITA, makes it awkward to try and cut and it is basically spring loaded if you put it on the ground because of the bushings.
Working with the hubs in place is also a real PITA, makes the assemblies much much heavier, harder to manipulate, impossible to clean easily (solvent baths etc).
If you are gutting the car, then I would suggest a full disassembly the front and rear could probably benefit from new bearings anyways, once the strut casings are bare you can even cut a large portion of it off and make it super easy to transport and work on. I pulled mine apart, gave a quick cut and dropped it off at the sand blaster to get all the grime off, you can see the difference, if someone couldn't use a solvent bath or a sand blaster because you had a bunch of parts bolted to it and had to just get the immediate area clean with a wire wheel I'm not sure it would be very good.
You might want to try Datsun Parts and Needs on Facebook, I know a couple of people have used mobile welders on there in california and might have a name for you, there are also quite a few people who offered the service for GC, this would in quite a few ways be much easier.