Heres a link to a pic of the little brass plug. There are 2 more after it as well. Forgive the still ring around the base of the cone, this little plug is stuck in the line and I'm trying to free it with little luck.

I wasn't sure whether, given that the master cylinder is below the brake lines, there might not be a little plunger that would prevent fluid from running back to the master. All I know is that this truck did have brakes that worked. Thanks!

http://i1131.photobucket.com/albums/m545/carmental2/IMG_0798.jpg

Thanks - Bruce