Seetz, if the carbon on your valves in on the port side, that indicates valve guide leakage. If the build-up is on the combustion chamber side, there is oil consumption from rings or head gasket leakage. If the engine is a '59, there is an oil passage going through the head; sometimes the head gasket leaks there, but that usually only affects cylinders 3 and 4 (I think). That oil passage supplies oil to the rocker arms. Also, the '59 engine has insert bearings for the connecting rods, so shims would be under the bearing shell, if any were used. There weren't any originally, but sometimes they are added after the fact.
Harvester
