All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
correct me if im wrong but the pcv valve is more of a emissions thing. it sucks blow by out of the case and tries to reburn it. idk about ruining but without it it might lead to excessive moisture/fuel being in the case and contaminating the oil, this might be where the white goo came from "water+oil=white goo" inturn would cause oil breakdown
Do your valve covers have baffles in them? If not, it could cause smoke issues.
...When i took the oil cover off it had a whitish goo in it....
If you have a port on the back of the manifold you could use it for the brakes and then use the carburetor port for the PCV.