I've started this post a couple of times as I realize there are some reasons why it might be better to lower the engine and tranny rather than to pull it up and out. Mainly I think if you want to spruce up the engine bay and not want to separate the engine and tranny or if it's up in the air already. Otherwise, I don't see much advantage to it. Maybe I'm missing something.
But the answer to your question is it's pretty simple. You would disconnect all the wires, hoses, and accelerator and choke cable from the engine. Disconnect the wires from the starter. Support the engine and tranny while you disconnect the half shafts (I think the shocks will keep the suspension away from the tranny), disconnect the motor mounts, tranny mounts, shift linkage, clutch cable, and speedo cable. Then you can lower it to the floor. You can do some of those things before you jack it up like disconnecting the stuff from the engine, wires to the starter, shift linkage, speedo cable and clutch cable. You can also disconnect the half shafts when you get the weight off the wheels.
I've might have missed a couple of things but I don't think there are any tricks to it. It should be very straight forward.