Mine are the Red Zones w/ needle bearings. Bought them in 2006 before the EZ Roll option came out. Just sent them back for a check up a few months ago and Isky said they checked out fine. Back in and running w/ no issues.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax