You can also use a SRW axle 14 Bolt with your DRW axle hubs, you can use weld on caliper brakets for disc brakes on the 14 bolt, the disc brakes will clear the big Semi wheels.
I have narrowed a couple of 14 Bolts & a Dana 70HD, I have the jig to narrow the housings. FYI Dana 60 & 70 spindles are the same as the GM 14 Bolts.
This 70HD was narrowed to be SRW axle width with SRW axle hubs, the pinioin is offset to be used in a Land Cruiser running 44" Boggers & a Big Block Chevy.