Rear arch replacement - dimensions required please

[slowmo]

Hi
Im in the process of replacing the rear arches, I have no previous arches to go off as they were bodged up.
Does anyone have an early bay with original arches who would be willing to give me a couple of measurements.
I require a measurement from where the side panel curves over just prior to the sliding door track down to the bottom edge of the wheel arch at both the front and rear of the flat portion of the arch.

I believe the dimensiom front to back should be different, these dimensions should help me ensure Im about to weld them on correctly. I get 628mm at the front and 634 at the rear

 

[slowmo]

Hi
Maybe my description was not very clear, here is what Im after dimension A and B. Where the top is to where the panel folds over and the bottom is level with the arch. hopefully someone can oblige!

 

[69billy]

on ours its 624 both the same. level. its from usa no welding done so should be right

 

[slowmo]

cheers dude
I was not sure if they were level, I thought they should be but been trying to look at pictures and was not sure.
Much appreciate you measuring it for me