520 rear axle assembly

[ggzilla]

Does anyone have a 520 rear to measure? I'm looking for these dimensions:

* width of leaf pads

* distance between center of leaf pads

* overall width, wheel flange to flange

 

I'm told some/all of these had alloy pumpkins?

 

I'm looking for a tougher differential for my 1200...a "near" bolt in. I reckon driveshaft will be the big cost item (shortening, etc).

1200 leafs: 2" wide

1200 width: about 49"

[Pacific coast Datsun]

Is the 521 axle the same as the 520? If i can measure mine & post the specs./pics.