if you're switch from a single cam to a dual cam...you are gonna need a transmission to go with the new motor. the d16z6 trans will not bolt to the b18.
its gonna be a full swap....no just replace the motor and ride out. unless you do some modifications with a bracket to bolt the d-trans to the b-motor. probably gonna be best to just use a new harness with the motor as well.
mounts may work...not completely positive about it.