[BarryGMC]

While you are at it you should check the PVC valve. That's really why your engine is pressurizing. It needs vacuum to pull through the breather. While your at it put some new valve cover gaskets in. Glue them to the covers with black rtv. This lets you pull the covers with ease. Then check the valve lash hot. .012 intake, .018 exhaust. This is a big problem I have found with these old boys, to little lash. Finally find someone with a dwell meter and a vacuum guage and set the timing. I bet there is some old timer in northern Alabama with these tools and the know his to use them. Lastly when ever I think of the rural south I think of the movie deliverance. I bet you think of my neck of the woods and think randy weaver and the order. It's a draw. But we have better old rigs. Barry