bparker wrote:The boat/trailer is outside with nothing overhead.
Here is what I would do.
1) Buy some lumber and build a 2 or 3 overhead arches. One for each lifting ring and maybe a third for extra support on the engine.
2) Use the tongue jack method or chainfalls/winches to get the boat supported by the lifting rings, off the trailer.
3) Build some wide, strong "safety" supports to go underneath, but make them about 1/2" too short so they don't touch the paint and you can move them around.
If you are brave you can skip step 3 and paint. If you are worried about a boat falling on your head, build the supports first.