James,
Take a look at this thread.
https://www.stovebolt.com/ubbthread.../14-bolt-axle-swap-info.html#Post1249600 It is pinned at the top of the "tons o fun" forum. There is A LOT of good info about 3/4 and 1 ton axle swaps. My 3600 has a flat bed, so axle width was not as critical for me, so I wasn't picky about my axle. The modern "14 bolt" axles can be used, you may have to do some searching to find the correct one. Any "modern axle" will have disk brakes. My opinion is if the back has disk brakes, the front probably should too.
A s-10 axle will likely function ok, but not be rated for as much load as original. It will also have 5 or 6 lug wheels, not 8.
Do your homework and get a game plan together so you only do the work once!! I learned the hard way how expensive/frustrating it can be to make one modification, only to go back and change it a second time.
Jon
