B16b HELP

HEy

Im getitng a B16B motor and im trynna swap wit with my stock JDM d16y6.

I've heard the hp rating for B16b is around 180 bhp
is it so?

also would the motor mount in easily?
secondly what about the ECU? im not sure if Im gettign an ecu with it? can Iuse my stock ecu?
also, im new ot all this, kindly xplain what is"OBD2a - OBD2b "
n if this is related to my case

thanks guys