You have to strap the front of C5, C6, & C7 Corvettes to the front lift arms when removing the engine/subframe. And the Lift Arms have to LOCK in position when raised!
Same goes for pulling the Transmission/Torque Tube/Differential/Subframe from the rear!
Cheapskate shop owner buying cheap equipment & hiring cheap/unexperienced employees. I worked at a GM dealer when the C5 came out.....If you wanted to do more than basic maintenance on them.....You had to go to training, My dealer flew 2 of us to Detroit. Not that-that would be required today.