i have a b series engine in a mini that i bought as a project but after buying an incorrect water pump for the car that i was told the engine was from im trying to identify what i have actually got

Stamped onto the engine i have
b16a
5423974

under the head gasket i have
p3024241

in three circles on the front i have
9/2 /1 2/0 /3

and randomly i have pr32



thanks for any inpout you can give me, been trying to find out on the internet but only confused myself even more