[bambam89lx]

dude...you need to seriously search on the mpfi swap...
You should be researching that before you ever plan on going with a B20...
But anyway, with the wiring of the B20b into your crx...it's quite simple.
You treat the B20 just as if you would a B18. They're basically the same motor with differences mainly in the block. They share 99% of their parts with each other.
If you plan on staying OBD0, then you would have to find a 90-91 acura integra LS, GS, or RS ECU and distributor from a 5 spd.
If you wanted to go OBD1, it's even easier to find the parts but more wiring is involved.
You would need an ecu from a 92-95 integra LS, GS, or RS 5spd. it's either going to be a PR4 or a P74 or P75...make sure it's obd1. As for the distributor...get one from any 92+ integra non-vtec or any year B20b/z.
You'll then need to get an obd0-obd1 ecu conversion harness and splice in some extra sensors to make ur car obd1. i'll be doing this in the summer so I'll post it up when i do it.