Hi @beekay
Here’s a link to the [https://cardiagn.com/2004-08-f-250-350-450-550-engine-5-4l-3v/|Engine 5.4L (3V)] section of the service repair manual for the vehicle.
Download the manual by clicking on the download icon at the top or bottom of the document page(to the right of the Zoom 100%), as this will make it easier to use.
Once you have the manual scroll to p.139/356 (pdf page numbering as the manual’s page numbering is too difficult) to find the ''IN-VEHICLE REPAIR Oil Pan'' section which describes how to remove the oil pan.
Here’s the [https://cardiagn.com/2004-2008-ford-f-250-350-450-550-super-duty-workshop-manual-wiring/|link] to the rest of the repair manual sections in case you need them as well.
Hopefully this is of some help.