Car is out of town at the body shop so I cannot measure. Found this cross member in my parts and want to detail it but I am not sure it is the correct one. There is one on Ebay right now that the seller claims is for a 70/71 E body, while it looks the same as mine the spacing between the mounting bolt holes is different.
Here are the measurements of mine.
-overall length 19 1/4"
-center to center of outer mounting holes 18"
-center to center of inner mounting holes 8 1/2"
I have also included some pictures. Any help would be greatly appreciated!