Here's the evac system I had been using. These valve covers are a circle track design that originally used a crossover tube with a couple small breathers, I eliminated the crossover setup and made some adapters to plumb them into a separator can that I had also installed a pcv valve into. The hose out the bottom is connected to a standpipe inside the separator, other end of that hose connected to the inlet of the electric pump. Outlet of the electric pump had a large header evac style check...
Street/Strip Crankcase Vacuum using a PCV Valve
