I'm wondering if just building a cradle like we do for the Sami case then have mounts off that would be just as good.
Tracker rear is 58"? A Sami axle at 52" is just retarded, I don't care what the front wms of the ifs is.
Toyota axles get a bad rap from guys trying to run 40s on a 5k lb rig with 500:1 gearing. Then like Jr said, wheelspacers, ifs hubs, 2" bs wheels ect. I've seen them take lots of abuse on 35-37s and white guy back spacing. Way more than a lame ass D44 ujoint.
As far as Sami vs Toyota, I broke a birf and r&p the first time I I went out with my 6.4 case, on 32s. Put bone stock Toyota axles in, literally just welded the diffs. Ran the same 32s, 33s and 35s. I was a teenager and drove like an idiot. With a 1.3, 6.4 case and stock 4.37s it was bulletproof. Only after the axle came out did I realize the housing had a slight bend from hitting a 2' deep 2' diameter pot hole at speed.
I do think they are a decent fit for a zuk and 35-37s. It does suck the front is narrower than stock.
If it were my money I'd find a unit bearing D30 and swap tubes. With all the different versions you should be able to get one around 60" wms. Companies sell sleeve kits for pretty cheap, which should make it easy to splice the tubes back together.
Lug pattern is as easy as redrilling or running some thin adapters.