 Never had a problem w/ stock retainers. Chip is that what you have in your Hemi? No, the KB block has it all made in one piece as the rear main cap. The World blocks come w/ a new retainer. All my stock block builds I use stock retainers. Don't see any need for a new one.
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
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