A bomb hoist for the rear bumper

[GB SISSON]

Last week I bought this little crane from a seller down south of Seattle on Craigslist. When I first moved to the island in the 70s the electric utility co-op had a similar hand winch unit on all their service bodied trucks. I always liked them, and I can't lift stuff like I used to. I called the seller and asked if I paid full asking price would he drop it off at a truck freight place and ship to me. I pay shipping (75 bucks). There was no close up photo, but I liked the enclosed winch. Well I picked it up at our freight terminal last night in the dark. When I arrived home my wife came out with a flashlight and we examined it. She read "portable bomb hoist" US navy ordinance dept etc. I was thrilled. I went out there at 'dawn's early light' and started measuring for the HD bumper to fabricate to mount it on my '47 tonner. Then of course I had to go to work. But stay tuned this spring as I build a mount and stays for this thing. The fine tooth ratchet is like a Swiss watch and it has some sort of 3/4 turn device coupled to the handle that automatically reverses direction without stopping to flip a lever. The base pipe measures 3 1/2" OD. What am I looking for a bottom 'cup'? Do they make 3 1/2" pipe?