How much you trying to lift ? That is going to put a good bit of stress on a pocket stake socket in my opinion. Consider one of these from Harbor Freight. https://www.harborfreight.com/automotive/truck-bed-accessories/truck-cranes/cranes/12-ton-capacity-pickup-truck-bed-crane-60732.html Or https://www.harborfreight.com/automotive/truck-bed-accessories/truck-cranes/cranes/12-ton-capacity-pickup-truck-bed-crane-with-hand-winch-61522.html I used components from both the above ones on a 750 drill for handling the seed auger in and out of the cradle. Works really slick and fits like it was made just for this application. 
There are also receiver mount styles that are a bit more elaborate instead of a quick in and out but probably more stable since they are ground bearing. https://www.amazon.com/MaxxHaul-70238-Receiver-Hitch-Mounted/dp/B008CE0WCW https://www.discountramps.com/apex-receiver-hitch-crane/p/HMC-1000 | 
Anyone make a ligth weight hoist for a pickup box stake hole?
