I'm late to this topic but here's yet another viewpoint; I didn't lift the body off using pulleys/ratchet straps or 4 strong blokes at either corner, what I did was to undo everything (or thought I had) and then drop the rolling chassis out from underneath.
Basically jack the car up with a trolley jack at either end of the chassis - the jacks eventually needed spacers to sit on to get the height - and then support the body with planks of wood down the sides using a mixture of axle stands & steel framework.
Once the body is supported, lower the trolley jacks and the whole chassis drops away from the body and rolls out from underneath. Or it would have done had I disconnected the oil gauge pipe - you'd be amazed how much one of those weedy plastic pipes can take
My method was driven by circumstances, I didn't have 3 strong neighbours to help and the garage roof had suspiciously small roof beams which flexed when I walked on it to replace the roof, so I didn't want to risk pulling it down. I was also working in a confined space, larger than a single but not a true double garage. So the body would have to stay in place while I dragged out the chassis, repaired it and then replace.
Hence the "lift complete assembly, support body, drop out chassis/engine/suspension" method. There are a couple of advantages, firstly you are using gravity with the weight of the rolling chassis to separate the body/chassis which can be difficult by lifting alone. I struggled when replacing the Elan chassis and ended up using a crowbar to prise them apart with years of rust/mud gluing them together. Secondly it's another solo method, not as quick as using pulleys but in my case, with suspect roof beams, very safe because the weight was all against a concrete floor.
