As the title says, where can I get completely ready to bolt up rear ends? Do they also sell the drive shaft?

 

If you buy a Strange 12-bolt, it will come fully assembled, lubed and run-in at the factory. Direct bolt in and works with the stock DS length. You may have to get a cross-over U-joint, since it doesn't make any sense to use less than a 1350 yoke on the Strange.

If you prefer a bit of "some assembly required", there is also the Moser 12-bolt. They sometimes require a shorter DS length, require different sway-bar mounts, and have a frequent problem with the bolts on the torque arm.

For a source, check out the companies listed in the "Supporting Vendor" link at the top of every page of the forum.

https://www.camaroz28.com/misc/vendorindex/