I envy you for your shed as well as my carrier restoration is happening in a tent on a gravel pad that has about a 10 degree slope.
To stay with the jacking thread, I would strongly advise the use of something like short sections of railroad ties for use as blocks to support the hull since they are pretty heavy and will help to prevent the carrier from slipping if you are in and out of it with the wheel assemblies off. A 3-ton floor jack can lift one corner of the vehicle with ease for placing the blocks underneath.
Again, mine is on sloping gravel so your project will probably be more stable. But once I had my tub fully striped of parts I had each wheel mounting pipe supported with a 5-ton jackstand. Seemed to hold OK until I needed to raise one side a bit and the stand diaganol to where I was jacking folded up and dumped the vehicle over. The stands are strong for direct downward pressure but will buckle with pressure from the sides.
Lots of fun getting it all back off the ground after that exercise.
