I wonder if he put in the wrong engine then. The rockers are held down by a bolt/nut combo that both have shoulders to them. I have gone through all 16 valves and adjusted them, however there is a limit due to the shoulder (hence the non-adjustable part). Even when I add a washer there to give space, which I shouldn't have to do, the one valve quickly deteriorates again within 5 minutes so it either has to be the cam falling apart or the lifter. When I tested it I took off the valve cover off, disconnected the distributor and had a friend turn the car over. When this happened I had equal movement between the bad valve and all others around it, which I have been told by an engine mechanic is the test to find out if it is the cam or not (if its the cam there shouldn't be equal movement). This means that it must be the hydraulic lifter, however I am not entirely sure how to get to it. I'm really hoping for some guidance towards a manual or schematic to rebuilding a 400ci pontiac engine so that I can at least feel like I have a safety net when I start pulling components.
As for pictures I will take/post some when the weather clears up. 280+ days of sunshine here and NOW it gets cloudy.
