How to Install a High Press Spring in a Small Block Oil Pump

I know this is an older technical article but still very informative. FYI for anyone interested in installing the high-pressure spring, the Mopar P369-0944 high-pressure spring kit no longer includes the plug. I received the kit last week, and it has a standard pressure and high pressure spring. I called the supplier, and they confirm the kit no longer includes the plug and said they can't source it. I'm going to try to find an expansion plug that will fit and will edit my post with that part number if I find one.