I have and 85 K5 Blazer with a 350 in it and it is leaking oil from the right side if you are sitting in the drivers seat. I originally thought the valve cover gaskets were bad so I replaced them but that didn't do anything. It got worse after I put the my three inch body lift on and drips steadily when its on. It doesn't leak when its off only when its on and produces a white smoke that I guess is from the oil burning off. From what I can see it looks like its coming out of the exhaust manifold or something in that region. Does anyone out there have any suggestions as to what it could be?