I am at the winter get-together right now, and Korves Oliver has the input shaft and coupler for sale here. I'll check their price and get back with you on that, but I'd bet they are cheaper.

You would have to cut the length of the input shaft in order to replace the mechanical lift with the hydraulic unit. The shaft is about an inch longer on the back side to hold a gear that powers the mechanical lift, and it doesn't leave enough room for the hydraulic pump to fit down in there. If you replace the input shaft, you won't need to cut a thing, as you can replace it with one of the correct length.

Another way to lift the engine without removing the belt pulley drive is to unbolt the bellhousing over the clutch, and then remove it and the drive shaft at the same time by moving them around to rotate up and out of the frame. I should have mentioned that. My apologies on that one.