Or if you didn't want to spend mucho dinero, you just need to weld on the correct sadles to mount the trailing arms to and fab up a mount for the track bar. I didn't do my rearend, I bought it this way. The person that did mine welded lowering blocks directly to the rearend. I don't really like it, but I'm going to leave it that way. And actually for the track bar, you could use the Early Classic kit that mounts it to the opposite control arm.
Oh yeah, Rage, I wish mine looked like that