A customer of mine has a very heavy E body he road races. Car will run 145+ on the track, 550hp stroked B wedge. It runs the 8 3/4 with Green bearings, good axles, and a Tru Trac. He abuses that car much more than anything a street car guy will do and they've been in there for 10 years. Nothing "weaker" about the sealed Green bearings vs. factory tapered cone.