If you like your car, If you realize the fact that you won't get near the money back that you spend into it. I'd go for the b18c5 swap. I'm not from cali but i'd call DMV or whoever and ask them something like, I want to get a better/newer motor for my car what's required to get it legally swapped, If they ask just tell them what motor, b18c5, Than just find out what they say or what you got to do etc.