I have a Bluebird 1,200 lb hoist with a very long boom and only one hook position. The legs of the hoist are straight and 37" apart on the inside.
The only problem with lifting my incoming 2,000 lb Bridgeport mill off the pallet is the lifting capacity. The frame and boom are sufficiently sturdy (American made - 1/4" wall).
I made some calculations based on measurements of other hoists with multiple hook locations. The amount of increase in lifting capacity from a relatively small decrease in boom length is remarkable.
If I move my hook location only 15" inward, the lifting capacity is theoretically tripled. Although it has a 3 ton jack, it should be enough for 2,000 lbs. I would through bolt a 5/8" industrial lifting eye to accommodate the hook. I should still have enough height given the 99" maximum hook height with the stock configuration.
Is there anything I'm overlooking?