You can jack the motor up with a block of wood under the harmonic balencer, drop the pan down enough to remove the oil pump pickup, remove the pan and change it in the vehicle, Ive done it. Really messy job , but it can be done. Loosen the main bolts and remove the rear main then change it with one of those Chinese handcuff looking tools {the upper one}. Soak the seals over night in oil and stagger the ends {not flush with the cap}with a dab of silicone seal on the tips. You can use the tool to pull the new upper in place. Crappy job for sure. Whether its easier to pull it out I couldnt say, I didnt have a way to do that at the time so there wasnt an option.