Pulling engine with no heads ?

[blazer2007]

Do you think this will be a good way to pull my 350 out, no heads and tranny is staying in. I,m probably over thinking this but was wondering if the bolts would have some stress on the block threads. Will be clamped tight to block with a rubber pad so as not to mar the block surface. Pick up points will be one in front left as pictured and other over on right rear. Those are some bumper brackets I had and they looked nice and sturdy. All my life I,ve never pulled a engine with no heads on.