I'll agree that the vast majority of the 191,986 Darts for 1970 were assembled in CANADA

~171,205 were built at the WINDSOR, ONTARIO (0R) plant (~89.2%), but
~ 2,818 were built at the Los Angeles, CA (0E) plant (~1.5%) &
~17,963 were built at the Hamtramck, MI (0B) plant (~9.4%)