I use moly wheel bearing grease on the bearing retainer. I also recommend putting the drivetrain in from the bottom along with the K-member and steering gear. Install the Z-bar afterward, but, everything else can be installed out of the car with no problem installing it that way. If the K-member is staying place and you're set on dropping in from the top with a cherry picker, it helps to have a floor jack to work the transmission tail shaft around and get things lined up. I agree with AJ, I'd install the engine first, and then to trans from the bottom. Bolt them together first out of the car to make sure they mate without a problem. Then separate and install them separately. The only fly I see in that ointment is the headers. Not sure how much they would be in the way by either top or bottom install options.