See-through valve covers - GIF

[hemmjo]

Wasn't much oil being slung about. .. SNIP...

It is just idling, the oil flow greatly increases as RPM's climb. For extended MAX RPM operation, we always enlarged and smoothed the oil return passages to allow the oil to flow back down so the the oil pump would not starve because too much oil was hanging around under the valve covers.

[Frank S]

It is just idling, the oil flow greatly increases as RPM's climb. For extended MAX RPM operation, we always enlarged and smoothed the oil return passages to allow the oil to flow back down so the the oil pump would not starve because too much oil was hanging around under the valve covers.

Oil galleys was one thing a lot of builders failed to pay much attention to, you can have the deepest widest highest capacity oil pan that will fit and the highest volume oil pump in the world but if the oil can't get back to the pan it is all for nothing