Do not forget to replace the main rubber sump gasket.
There are kits
If I were you, I will drain the sump, then collect also oil in the sump, then mesure the old oil quantity.
Then , after cleaning and putting a new filter, I will add about 4 liter max, rather 3.7, and start the engine and let it warm iddling, and after at least 20 mn check trnamsission level and add very slowly and check.
It make take an hour to make the right level, too much is very bad, destro trnasmission.
Then you drive about 20 km and check the level again, iddling and adk=just if necessary.
97 Continental R