If you pull the engine you will have a much easier time getting everything right. I took out the kmember to replace my pan, and I got it done, but working on your back underneath the car, assuming you dont have a lift, is more difficult than with the engine out and up in the air/om a rotating stand.
'03 Silver Birch. Stock rebuilt 4.L 32V DOHC, V7-JT blower w/ADTR racing supercharger kit, Shift kit in transmission, stainless works long pipes and cat backs, Ridetech coil-overs front, shocks in back (ADTR kit). Rebuilt calipers, upgraded front rotors, OEM Mercury wheels, [boost, oil P, WB fuel/air, and fuel pressure] gauges. Build duration was Dec 2019 to Mar 2022. 8 rib serp belt upgrade i/p.