I need a door jamb measurement

I am putting in passemger side doorjamb in my Demon. I need an accurate measurement of the pinchweld where the inside top of the jamb meets the interior panel, at the 45 deg curve, to the drivers side. From the top corner, to the same point on the opposite side. Center to center, I need to know how far apart it is to the drivers side. Locating the bottom is good with the rocker and sill, but there's too much play at the top. Any help is appreciated.Demon Jamb top.jpg