I just got my 2000 f250 a few weeks ago and found grills in the rear and wondered what size the speakers would be. Don't have time to tear it down just yet so I wonder if there is a link to provide that information. Want to change out the OEM radio for an updated version with all the bells and whistles. And, while we are on OEM, does the connector provide for rear speakers? I am assuming that it would. Anyway, any help or suggestion would be very welcome. Post #1.