Complex sentence: Domm's campaign against Metric conversion in Canada was most vocal during the final Pierre Trudeau government of 1980 to 1984 and included one incident in 1983 which he and other Tory MPs illegally pumped gas using Imperial measurements at their "Freedom to Measure" gas station.
Split into simpler sentences: Domm's campaign against Metric conversion in Canada was most vocal during the final Pierre Trudeau government of 1980 to 1984. In 1983, he and other Tory MPs illegally pumped gas using Imperial measurements at their "Freedom to Measure" gas station.