Widening a Dana70 rear axle?

[DarkFlounder]

The PO of my 72 K2500 replaced the original Dana60 rear with a Dana70 (the truck spent most of its life hauling firewood).

The Dana70 came out of a dualie, and even with a spacer, the rear wheels aren't in line with the front wheels.

So, apart from finding an original Dana60 to put in her, what are my options? More spacers just seems wrong, and converting the truck to a dualie isn't an option (the truck barely fits through my garage door as it is).

So, narrowing a rear end for huge fat slicks is common, but I've never heard of anybody widening a rear end.