It is the rear frame rail... Basically tying the back of the K frame into the last little section of the charger frame rail... combined with the extensions I had made before... (I think on page 2)
I am trying to do it so it doesn't just look like a back yard tube frame "Here this will work" kinda thing underneath... I plan on having a "trunk" floor at the same height as the old charger floor...(the trunk should end up about 16x16x50 inches)
This could have been done "better" a number of different ways... But ... This seemed like the simplest idea... Suggestions are always welcome around here...
Here is the "before" of that section...