70 Charger Core support measurments

[collers9640]

I working on a wreck 70 charger and need some measurements.
I put a complete front frame a 68 coronet,
I just put in new amd fender aprons but
I'm using the original core support as I was
able to straighten it.
I will do my best to explain the measurments I need.
I need to know the width and height in between the top support and bottom support to gst the height correct and I need the measurement between side support. I pretty much need the measurements of the square shape the panels form.

[collers9640]

I did find one diagram from a 69 charger.
The Height is shown as 17 1/4 and the width is 25 7/8
Does this sound right?
Here's the link to the diagram go to page 4
http://www.vintageair.com/Instructions2013/901233.pdf