I would not complicate it............Just drill and use a 1/8" pipe tap for a 1/8" Pipe Plug as shown which gets you at the Bottom of the Differential Case.
See Item #4 LT5 Added Systems
I placed the Differential Drain Plug just on the Drivers Side of what I call the Molding Seam in the Center of the Flange Thickness.
The kit provides a template that puts the hole just left of the center bolt in the valley of the differential.
Original Photos provided by
Scrrem on another topic with Red notes added.
