I am collecting bits for the next project. Just as I come across them. No hurry.

I bought two sierra diffs unseen. It turns out they are both 7.5" from a saff twink.

Ones a 3.91 push in and the other is 3.92 bolt on.

I am guessing these are bugger all use ?

Will the drive shafts and hubs from a bug eye granada/ ultima
A)fit
B) give the same track as a sierra rear end.

They are 4 stud and I am told the hubs are the same as 4x4i but the shafts could be a total of 30mm longer. I think they will be both 100mm lobro.

Any info would be greatfully received from the pool of knowledge

I would check the diff size, usually the DOHC sierras had 7" diffs.
Easy way to tell is the top mounting bolt.
1 bolt all the way through it's a 7"
2 bolts either side it's a 7 1/2"

They are 100% 7.5" and the sierra saff was sat there. So was the twink and Mt75.

Scorpio hubs will fit but the shafts are longer .I have used the scorpio 7.5 4.27 with sierra push in shafts just remove the drive flanges from the diff,or use sierra bolt on shafts.