Trying to help a buddy find a part for his 69 Roadrunner. He has alot of rust issues and has fabbed most of the tricky stuff. He asked me to help him find a part he felt was too hard to make himself. It is a body/structural piece that can't be seen. It is behind lower front of the quarter panels. To the rear of rockers. This is how he describes it:
The rear end of rockers attach to it.
The front end of the quarter panels attach to it at their bottom.
The bottom of the quarter window regulators attach to it.
The door jamb striker panels attach to it.
What is this called??
I am trying to order it from a junkyard but can't until I know what part to ask for.
Help me out guys.