Ah, okay, well, now that we've got that out of the way...
I think the scout diffs are 58" wide. Which is about 2.5-3" narrower than a stock D30. This shouldn't be a problem, you'll just need to run less backspacing on the rims. But, as a warning the brackets might start to get tight near the inner Cs on the axles. You can't narrow a D60 any more than to 64" if you intend to use the stock XJ style brackets, and I imagine a narrower D44 could run into the same issues.
Ford makes a bunch of driver's drop HP and LP D44s. They seem to range in width from about 65" to 67" wide. Half of them are ugly, as they are a radius arm axle and have large bracket castings instead of axle tubes, making it impossible to narrow the diff or run anything other than the ford suspension. These axles showed up in '78 and 79, and are worth very little. Earlier ones could be cut down easily to fit grand wagoneer axle shafts (61.5" wide, IIRC).
I had (and still have lying around) a HP D44 that is cut to take GW shafts.
The ford axles came with 2.75x.375", 2.75x.500", or 3.0x.375" tubes (which are stronger, hehe). The radius arm ones were 2.75", and some (maybe all?) of the leaf spring ones were 3.0x.375".
The grand wagoneer front axle works well too. 61.5" is barely wider than stock. I ran one of those for a while.
(All information is off the top of my head, and is subject to distortion from alcohol abuse)
