Just keep things clean, and torque the valve body back down evenly.
The park rod can be a PIA for a beginner, but it's not a big deal.
Generally just a little turn of the driveline will let it come out and go back in.
OR you can just take the clip for the rod off and leave it hanging in there.
Once the electrical connector for the solenoids is loose and the VB is hanging by the park rod hold the VB up in the semi installed position and give it a little yank towards the motor and it should come out.
If it doesn't, twist the driveline a little while you give it that little yank forward.
(Same going back in) as the park gear needs to be in a position to let the park lever move out of the way and let the knob on the end of the rod by to come out.
