ok i have a 91 CRX Si with a b18c swap.....its running on the stock ecu....i jus bought a p28....i jus want to make sure im getting everything i need....so im planning to buy the obd0 to obd1 piggy-back harness and a jdm obd1 bseries distributor.....is there anything else i need to get to complete this conversion??

 

4 wire o2 sensor. You'll also probably want the harness side clips for the distributor and o2 sensor, so it doesn't look like a hackjob. Goodluck!