Complex sentence: Assembly started in 1967 at Steel's Motor Assemblies (which also built the Toyota Corona and later became Toyota New Zealand's Christchurch plant) after a government order for 672 units, and the model remained in local assembly at various plants for several generations.
Split into simpler sentences: Assembly started in 1967 at Steel's Motor Assemblies, which also built the Toyota Corona and later became Toyota New Zealand's Christchurch plant after a government order for 672 units. The model remained in local assembly at various plants for several generations.