Y'all remember that bolts are graded in tensile strength not shear. A 12.9 Allen will snap in half under heavy shear load with no warning compared to a 8.8 will bend alot before it breaks. Simon has a good thread on engine stand bolts somewhere around hear.
Right, which is why i was concerned on a engine stand. I didnt trust those 8.8 threads to hold my motor. Your using more tensil strenght on an engine stand than a shear strength