Taking the crank out is pretty straightforward. The engine block has to come off the trans obviously.
Before removing the block, I would remove the other 3 pistons. I would then remove the block, flip it upside down, and lay the head deck on a piece of plywood. The clutch, flywheel, front pulley, and front timing cover then need to be removed. The injection pump and rear inner timing plate can stay, along with the cam and lifters. You can then remove the main caps and the crank, assuming the oil pump and balancer are already removed.