What kind are you running on your blower motors?
I'm using the tall 4" towers on my valve covers with lines plumbed into a check valve threaded into the welded bung on the headers. With the dual wedge baffles, even though I drilled out several holes, it holds back enough pressure to keep the check valve closed. My headers are dry and I don't usually run baffles.
had a set of bassett headers (over transom) ran the moroso evac one way valves you weld into the headers. but i still had some weeping oil from around the towers on the valve covers (even after resealing) thought maybe with a blower motor i might need a evac pump to stop the pressure. then i bought a different boat with bassett water jacketed headers with no real place to weld a one way valve into. so i bought a jegs breather canister w/drain and ran both valve cover vent hoses into it and now (same motor) does not weep any more oil :rollside:
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