On my Greyhound and probably Predator engines the rubber breather line that goes into the OHV valve cover shrinks over time and oil starts to leak out causing a mess. This is a fix that is also a neat little thing to make the engine look old. I silver soldered a copper hose into the hole in the valve cover. I can now either put a rubber hose on the outside of it to couple it to another length of copper hose to the ground or just run rubber hose to the ground. No more oil on the engine 
