@joefromchicago,
I never consirered that the original producers of the original Godzilla had purposely left spaces into which other countries could overdub their own stars. The last time I saw this version of G'zilla was about 5 years ago when my son nd I were watching and yukking it up like "Mystery SCience 3000". As I recall , Raymond Burr looked like he was phoning it in and any time he was gaving direct contavt with the Japanese cast, the actors they used for the American version all had their backs to us .
I recall many of the titles of these Japanese films, like "Destroy all Monsters"
I remember from MS3000 when they played a version where Godzilla was rehabilitated and was actually on the side of the people. Nice Godzilla, Good Lizard!
A much better movie(at least from the effects POV) was "The BEast from20000 fathoms" (which is a geological impossibility). As I recall, that monster was an original claymation (when they still used clay and you could see the glistening smudges where the clay was dented as they manipulated the frame of the monster).