My 64 f-85 has a '66Chevelle 12 bolt rear end. the pinion seal marks it's territory as well as keeps the bottom of the car from rusting. Long term goals are to fix a lengthy punch list before spring. So I ordered seals gaskets ect. from parts store only to find he has every thing but the pinion seal. So I checked the wide web and it looks like there is no pinion seal for a 12 bolt Chevelle rear end. Pick up only.. Any help from the HAMB? what do you use?