I live in Northern California (Bay Area), and I have an original 1984 Chevrolet El Camino California car with the stock 231 cubic inch (3.8 liter) engine. Can I legally swap to a 350 cu.inch engine as long as all emissions devices are working properly? Can I install an engine with a displacement larger than what what was offered originally for the vehicle? Just because an engine is distributed as a 50-state legal motor, doesn't mean it's 50-state legal for all vehicles.