Milodon oil pan and what is correct oil level on dip stick
IMHO
The stock oil level would be the same regardless of the oil pan.
If the new pan is deeper and holds more oil the level should be that same.
Example...
OEM 4 qt plus 1 for filter. Dip stick shows full.
Change to a 5qt oil pan plus 1 for the filter (when you have 4 qt plus one for the filter in the pan) it should show 1 qt low. Add 1 more qt and the dip stick will show full.
the level in the engine will be the same you just have 1 more qt in the pan