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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
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Went ahead and replaced those PCV valves just in case since they are cheap. So a clean Crankcase Ventilation Filter housing with new paper element and new PCV valves. New gaskets on the valley pan and valve covers and intake manifold, and added the missing gasket on the distributor. Also finished the carb setup using Fetch's build thread as a guide. She is idling good, with a hesitation issue mentioned somewhere above, so I won't rehash that. So far no oil leaks from those areas...but I have not driven it yet; just let it idle.
A former neighbor of mine stopped by who knows a whole lot more about cars/trucks than I do. While listening to it run, he also suggested adjusting the valve lash. I'm going to let him assist me with that so I don't screw up anything, having never done it. It sounds easy enough after looking it up and listening to what he said, but I have been known to turn easy jobs into very difficult, incredibly long ones.
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I have a short video of the "sounds" of the valves and hesitation but, I don't see many folks posting vids on here.