Just a safety reminder...
Anytime you are pulling on something with that much torque, put something across the free span on the chain, cable, or strap... IF it suddenly give way (breaks, slips, etc..) it will act as a damper and usually end up putting the chain into the dirt..
I usually use something like an old jacket, work mat.. Anything that will "kill" some of the energy being released by it giving way..
Started doing this riding ATV's... had a little 2k lb. winch cable break and almost took my head off.