
This is the front support. Starting at the front of the car, the first cross brace is between the front of the car and the first floor support. It's 8" from the center of the floor support to the center of the cross brace.

This is the second brace. It's half way between the first floor support and the second floor support. Still working from front to back.

This is the third brace back. This is also half way in between the second and third floor support.

This is the last cross brace. It's 17 1/2" from the center of this brace to the third brace.