7.25 drum to drum measurement

Hey All - I have ordered a new rear end from Quick Performance and they need a measurement that I don't have. I measured flange to flange and center to center of the leaf springs but they are requesting the measurement for the outside of drum brake to outside of the other drum.

The car is a 1973 Scamp - the 7.25 is stock and all my measurements have pretty much been 'exactly stock'. For various reasons I am unable to get the car up and wheels off to get this measurement but am confident a stock measurement will be correct - does anybody have this to hand or can point me in the right direction to find it?