That's a good point and that plug might be hidden in a different spot. Let me give you a couple of images showing how the one above was made:
Attachments
MVC-828F.JPG (31.46 KB, 180 downloads)
MVC-829F.JPG (36.88 KB, 178 downloads)


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end