[b454rat]

When I had my 3wd 62 burb, it had the stock axles in that I gave back to the guy. I swapped in 3/4 tons, rear was a Dana 60 from a Ford, bolted in, front was from a mid 70s Chevy, again bolted in. I want to say the front shock mounts where a lil different, but that was almost 10 years ago.

As for closed knuckle being stronger, I don't think so. I know many of them have tiny u-joints and small stub shaft, and I think smaller inners as well. The upgrade would be worth it just for the breaks.