GODZILLA, KOTM- US version with Raymond Burr
RODAN- US dub
GODZILLA vs THE THING- US dub done at Titra
MONSTER ZERO- was a coproduction between Toho and the US company UPA. The dubs for both the Us and international versions are the same, but it was done in the US at Glen Glenn Sound.
GODZILLA'S REVENGE- Glen Glenn Sound
TERROR OF MECHAGODZILLA-international dub. There is no US dub of this movie.
Toho didn't start creating their own dubs until the 1960's, and the first US Godzilla film to use an international dub was GODZILLA ON MONSTER ISLAND. Since then, only GODZILLA 1985 and GODZILLA 2000 have had US dubs created. All the others have used international dubs.