i searched HT with no info found and i know if i post a theard asking this question it'd get locked, so i'll ask here

i bought a B16b from a member here saturday and need to know what i need to swap this motor in. i already have a B18a in my 90 civic and did my research for what i need to swap in a B16a but ended up buying a B16b. i want to use the cable transmission that came with the B18a, but from there i'm not too sure if the process is the same regarding the swap. i had planned on keeping the B16 obd0 and using a PR3 ecu, but the person i bought it from advised me to convert it to obd1 and use a GrS ecu...so i need a little help with this swap