This is a great post and seems like a simple method to get the car up off the ground once the main problem is solved - getting a standard floor jack to fit under the car.
However I've searched many of the posts here and still can't find the answer to why jack stands can't be used under the frame rails, even with jacking pucks. "RocketSled" mentions lifting the whole side of the car off the ground using one of the jacking puck locations.
The car doesn't know if there is a floor jack or jack stand under it so if you can't put a jack stand under the jacking puck locations, what are they for? If the frame is stiff enough to lift it from a jacking puck location, what is the fear of letting a jacking puck sit on a jack stand? Nearly every photo I see of a vette on a mechanic's lift, it is being supported by four arms under the jacking puck locations.
Is GM simply trying to prevent the liability of the car slipping off the somewhat small lift point and either damaging the car or causing serious injury to someone under the vehicle?
My engineering mind can't seem to find the logic in this.
Lifting and Jacking Locations