Not to be argumentative, but he sells a weld on bracket kit, as pictured. Perhaps he includes installation instructions, but I don't see "a whole lot of other fab work" in his installation pictures, or anyone else's.
But, while we're on the subject and in the desire to add knowledge, is see his brackets also offset the engine to the left. I've never seen an explanation of why this is done. Is it for front driveshaft clearance? I can certainly see it with the stock setup and offset rear output, but doing so makes the rear angle slightly worse with a center output transfer case