Did you read the part in the OP's original post where he said the ONLY thing he changed was the leaf springs?
That would mean that the green bearings and disk brakes aren't new. Which would mean the green bearings aren't the issue with the axle housing not being centered. You sure as heck wouldn't be able to get the disks lined up in the calipers if the axles weren't fully installed.
There are literally millions and millions of Ford 9's on the street with bearings of the exact same style as the green bearings for the 8 3/4. They work fine on the street, and have for many decades.
I personally like having the tapered bearings, but saying the green bearings aren't good for street use is just silly.