I personally know very little about boosting a b18a/b but I do know that if you're going to boost any motor, boost the b18a/b because of its near ideal stock compression ratio for boost. that being said, I would boost your motor like mtber said but I would get it rebuilt first, depending on how many miles are on it and depending on how long you would like to use that exact motor. now as for me, if I would do anything to my motor now, I would boost it with a high quality turbo kit.