I run a little different set-up that seems to work. I run breathers on both valve covers and replaced the intake/rear breather with a pcv unit modified by George Anderson of Gessford in NE. that runs directly into the back of the carb. for vacuum. Before adding the pcv valve and running nothing but breathers the valve breathers would leak
oil that ran down on the heads & headers. The current set-up fixed the problems and avoided extra unwanted lines running from the valve covers. I think you can see my set-up in my gallery. Best wishes!
You can see it, here is the link:
http://www.clubcobra.com/photopost/s...t=1&thecat=500