If you're running the H145 you'll break the axles the first time you give it a serve. Seen it happen here in Australia, the worst case ended up with the car driving into a sandstone wall. Ouch.
The later utes came stock with a H165, what year is yours? It looks to be LHD, from the placement of the wipers in the picture, I don't know when they started making utes that way. Could you measure the diameter of the diff centre, I have a few centres I can then measure as a comparison. If it's the later centre, just get another centre & weld it up, swap it in & see if you don't mind the disadvantages. If it's annoying you, swap the 2 centres. I'd try & avoid making it difficult to revert to the normal diff by welding it, you can't unweld it if you don't like it. I've run welded diffs in my race cars, & sometimes on the street, but the first time I tried to coast into the driveway quietly & the rear end locked up, I decided against it.