Are there datsun 1200 utes in your part of the world? The diff in those are a H165 and strong enough. Fairly easy sway to.

If H145s are cheap, use them. If it breaks, replace it.

Welding the differential will cause it to break faster.

yes there are ute's in this part of the world but they are extremely rare, and are all UTE's diff H165?? and is it a bolt on? any other suggestion for bolt on axle swaps or diff swaps? i dont want to alter it to much as the fabricators here are not so skilled...

B210 h150 rear axel may be easier to find, they take more abuse than the h145

1200 Utes are all H165, it is a complete bolt-in IF you use the ute driveshaft and use spring plates & u-bolts.

B210 COUPE axle assembly will bolt into 1200 COUPE. I think the ute driveshaft is needed.

ok, a customer brought a 87 cressida for 1uzfe swap, it has a LSD diff, they are not that difficult to find here....

But they are considerably wider than the 1200 rear axle assembly. If you find one that is only 2" wider, by using high-offset wheels on the rear it can work out well.