Vintage Original PREFERRED Voltage regulator.   NOS    12V  305-104   Part # VRG 120. Replaces. C3SZ-10316A-B  ( GE-I3). Applications on box suggest .

Comet and Falcon-1965-69 , Ford 6 &8 Cylinder 1965-69,  Mercury 1965-69,   Please check your car specifications .