Complex sentence: The production of 289s started at the Windsor Engine Plant Number One in 1965 and continued through to August of 1968 while the Cauatitlan Engine Plant in Mexico started to make 260ci and 289ci engines in 1965.
Split into simpler sentences: The production of 289s started at the Windsor Engine Plant Number One in 1965 and continued through to August of 1968. The Cauatitlan Engine Plant in Mexico started to make 260ci and 289ci engines in 1965.