Jetmech1990

Hi all I am new here and have a few questions I couldn't find. 1st is the # 1 cyl. I want to verify it is rear bank passenger side. 2nd is if I purchase a PCM online with the proper catch code, will the vehicle run without a PCM flash from the dealer? If not what are they flashing? Is there a more reliable coil that the OEM ford? I really can't complain I have 98k and haven't had an issue yet, Original plugs as well. Thanks in advance