Well it looks like I accomplished my goal (somebody searched and found this thread
). There are a lot of good ideas in this thread. Depending on the equipment you have available you can pick what you feel most comfortable with.
I did have a parts car that had obviously been lifted by the trunk latch, Not only was the latch bent pretty bad but the metal that the latch bolts to was obviously distorted. I wish I had taken a picture but that car is long gone. They probably lifted with the cradle and engine still in.
As long as I have a cherry picker I will use the method I showed to start the thread assuming the car is not rusted ( I would not knowingly buy a rusted one)
As far as being stable I accidentally proved the method I used is VERY stable. I had the front of the car on ramps doing other work and decided to leave it on the ramps when I went to lift the rear to install the engine. I did not chock the backside of the front wheels and was not paying close attention as I raised the car. Instead of the cherry picker moving toward the car the cherry picker was pulling the car back. All of a sudden the car came rolling down off of the ramps with the rear end about 3 feet off the ground. Scared the **** out of me but the car barely wiggled. It did not sway from side to side in the slightest. The "tin" where the hook were connected had absolutely no detectable distortion.
Use whatever method you think is safe for you but please be careful and remember to watch the front of the car too