Also see if any holes were drilled underdash for possible police radio installation,and an exterior antenna hole on the front fender or rear deck/fender area.
Is it a factory radio delete?
Check the trunk for signs of patching of this hole,and anyother holes.Remember the post on a trunk mounted anti-rollover device on the trunk floor?.
If it's original paint,look at the roof for any signs of exterior mounted emergency lights.Relay the Engine-Trans.-rearend suffix numbers.In this case all would speak for themselves as to it's true heritage.
