The only gray globby grease I know of isnt grease at all. Its what oil turns into, inside old motors that are running on leaded gas. In other words;sludge.Circa the 60s and 70s.
It is only on the rocker assemblies and for sure something somebody put on there. The rest of the engine is very clean and sludge/grease free. I will look at the spare ones I hsve to see if they are same length and size.