Suburban measurements: Help needed!

[HEX214PONY]

Hello everyone. I am currently working on a 69 Chevy C10 which is to become an extended cab. I need the measurements of a 67-72 Suburban Drivers Door.
Here is an image to help understand what measurements I need. I am basically trying to make the door frame out of extra doors. I know I can simply purchase new doors but I am doing it to gain experience. Plus its always good to save a few dollars. Anyway here is an image to show what measurements i need. A = distance from corner to corner of top of frame. B = Measurement of interior corner to corner C = measure of angle between both horizontal and vertical member.