A friend of mine just finished putting a SOHC ZC motor into his 89 civic (street car) and complete drive train. He claims that it uses the same series of tranny however it has a factory LSD. My question is that if this tranny is of the same series does anyone know if I can just swap out diffs? Reason I ask is because I can pick up one of these Japanese spec tranny's for about $400 canadian.... ANY COMMENTS?????