Question about adjusting distibutor ...revised?

Rusty My guess and its likely right is you jumped a tooth on the timing chain a good system needs almost NO real adjustment. you could also have a vacuum leak that is causing the distributor to miss read and I would start there. I would plug off the vacuum lines and see if it will adjust better. if it does the engine has a vacuum leak if no difference it may be the timing has jumped or was one tooth off when installed. just wanted to add that when you are turning the distributor you are telling the spark plugs to fire off either in the highest point of the piston going up or just before it reaches the top and the opposite or as it is started downward slightly. (advanced , tdc, or retarded.)