Driveshaft lengths wish there was a sticky

I was gonna cut and balance the one from the 74 dart i parted. Longer wheelbase car, 7.25 rear. Driveshaft has very little surface rust on it. Will sandblast well. Just need definite dimension. Geof, does C/C stands for center to center of the ujoint cup holes yes? No? Not familiar with that nomenclature.