Since you have low tension rings, the breather setup like Hemi-itis showed you is what you ought to do. A vacuum pump is what it really needs though. I have low tension rings in my hemi and tried to use just breathers on the valve covers for a while...it slobbered oil everywhere when you romped on it. I ended up putting a vacuum pump on it.

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