yes you are right about the ABS sensors. they would need to be taken off the diff, before its rolled down. Thanks i forgot that.
but as for the CV- the boot, the shaft will rotate in the diff. no differently than if the wheel was spinning. and i think when you lower the diff down there is nothing that the boot would lean on.
and in case you still don't feel its safe. i've done trans' on SC's twice and this is how i did it, and never ran into any problems.
jim