The 1970 Ford Thunderbird 4-door sedan used in this episode,looks like the car used in the closing credits of the 1969-1970 season.
The tanks are M41 Walkers.
Interesting car, A 1970 Ford Thunderbird 4-door with the suicide doors and lots of tanks. Rows of tanks probably used up by the Army and given to the marines. All on a Navy storage depot.
FBI Carousel Bulletin: Not exactly a rotation notice - Hank Brandt reappears as S.A.C. William "Bill" Converse. As the show went on, the character shuffling between actors gradually diminished but never stopped entirely.