[Mrmerlin]

. I torqued the clamp down and put a PKlamp on. I did not check the rear. Do I have to go back and undo the front before I can check and retorque the rear?

The correct procedure would be to loosen the front pinch bolt,
then inspect the rear pinch bolt.

NOTE You may wind up having to move the driveshaft front to back to recenter the rear pinch bolt,
and you cant move the shaft if the front bolt is tight.

that said try loosening the rear bolt and see if will come out,
so you can see if its damaged on its shank

IE remove it to see if its damaged,
it can be damaged if it was loose,
then either replace the rear pinch bolt,
or tighten it,

then tighten the front bolt after you pry the flywheel to the rear of the car