I recently went through a '70 manual steering gear and was able to locate both seals, but the flat gasket that goes under the adjusting plate (with three bolts) was unavailable. I did a clean prep and used permatex instead of the gasket. I packed the bearings, worm gear and the entire case with Mystik JT-6 grease. It took most of the 1 pound can, and so far no leaks.
Wallace