So i have a stock y8 turbo and im getting bored with it and i think its time for me to step it up. I thought about buying a newer faster car, but i wanna keep my Civic. Im looking for the best DOHC motor to build for boost. I wanna be able to boost about 15-18 psi safely. A friend of mine knows how to build the motor and how to do alot of the actuall work. he just wants me to get all the parts together for the build, and swap. my goal its to make at least 300hp. I need some help as to what the best motor would be for me to build for turbo.