Originally Posted by 70satelliteguy

How many of the "no leak" rear mains also use a vacuum pump or header e-vac ???

I have 3 of my own here...one has a vacuum pump. The other 2 just have breathers on the valve covers. Never been a fan of the header evac setups.

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