If your tree hasn't been lubed very good, I would start buy using motor oil. Put a towel under it and apply the oil liberally. After you have driven it for a while, do it again. This will help work the dirt out and get everything lubed. Then you can lube with SAE 90 gear lube, and apply some lithium to the protruding tangs and levers.
For the wheel bearings, the rollers should last a long time if properly serviced. Just use a standard wheel bearing lube. Be sure to work it into all the nooks and crannies in the bearing. I don't have a shop manual for a 62 to tell you how to adjust. My 52 calls for 45 ft-lbs torque (of the top of my head), then back off between 1/12 to 1/6 of a turn to insert the cotter key. I also rotate the wheel and torque and back off and retorque a few times to be sure everything is seated. The shop I worked at in 72 had a wheel bearing torque wrench. No ft-lb readings, just a mark to tighten to, then two marks for the range to back off to. We also had a wheel bearing packer which can be bought for a few bucks. Insert the bearing and start pumping grease from a gun. Does a far better job packing rollers than I can do by hand.
