Pushrod oiling/heat?

That is BAD and failure is right around the corner. The fix is a PITA, but I’ve seen it too many times to miss it. The oil holes in the rocker shafts do not line up with the holes in the rockers when the valves are on the seat. And they must be lined up when the valves are on the seat. So you need to mock everything up with bluing on the shafts, and using a thin scribe go through the hole in the rocker and scribe the spot on the shaft where the hole should be. Then you have to disassemble everything and drill the holes where they should be.