For the purpose of this demonstration, I grabbed a used DGV out of my parts bins. Please excuse the dust.
Here is the little plug you will need to remove, right above the idle mixture screw and the between the two vacuum ports.
Use your 7.5 mm drill and start slowly. Generally, the drill will grab the soft brass and the plug will start to spin. This is just fine. Keep it spinning and it will pull right out, leaving...
