the driveshaft will slip out of the transmissin, but it may save a littler grief if you drop it from the rearend. If you can take some plywood with you(taht you would leave behind) that will give you a good surface for the hoist. A few hours, I would think. I've done engine swaps by myself, not that bad pulling because you aren't trying to line stuff up. Run things over in your head, may save you some grif with the engine halfway out. Last engine oull I did I disconnected the wiring for the engine at the firewall. One diconnect, instead of a bunch of little ones, plus you have all the wire ends if needed. Don't know you're experence, so forgive me if I'm telling you stuff you already know!
pull the hood
Pull the rad,heater hoses,
wiring (should be a ground strap on the back of the engine, the kind of thing you find when the engine is halfway out)
accelorater cable & kickdown linkage
motor mount bolts on the K frame,one on each side
If just taking the engine,forget messing with the driveshaft and Netiral switch wires,
unbolt the trans to engine bolts,including the starter,pull the inspection plate off the trans so you can get to the torque converter bolts (4)
exhaust
what are you using to attatch you cherry picker to the engine? small chain bolted to the engine will work if you don't have a motor plate.
are you planning to run the engine as is or rebuild? the yard should be able to fire it up and let you hear it before you pull it.