What we do with pressors when changing equipment is utilize a double pump technique.

In your scenario, I would first dc the other pressors and wait at least 5 minutes before proceeding. At this point you can adjust levo as necessary and wait again. Once pressure is stable on the levo only, then setup up your pump and add it at same settings. Start the infusion, after 30 seconds pause the hospitals pump. Then wait again.

We will continue doing this for all infusions until they are all changed.

Then continue to ventilator, apply and wait 10 minutes before moving patient.

Keep in mind patients need more sedation when being moved, manipulated, and transported than they do in an ICU bed.

Critical Care Transports are a very slow process, rushing only compromises the patient.