Oil Splitter Plug -- 360
Okay, I found the procedure in the Chrysler's Magnum engine book. Page 100-101; 7.5" is correct for Magnum's at least. I doubt LA is much different although the 318 is at 7.25".
The guys who built my shortblock forgot to install this plug in my 408, I've ran about 200 miles without the plug. That is why I asked.