It really depends on which version of the bearings you have, if has the press on retainer on the front of the bearing I would use the inner seal with them up
If is the one that the outer retainer is loose they haven't leak on any of my cars, race or street, with out the inner seals up shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)