i've been driving and building rx-7's for the past 5 years and hardly know anything about honda's ok here is what i got. i have a 94 civic si that runs great with a chipped p30 ecu and runs great but not all that powerful. i also have a first generation b16 swap that i got from a friend of mine 300.00 bucks it has a cracked block i was wondering if just any b series block would work on it like a b16b or maybe even a b18c and if it does would i have to change anything or would it just bolt right up and what type of hp and torque would i be looking at.