you need obd1 electronics/dizzy/ecu/map etc, but if you have a swapped b18a1 crx and the running gears good, run with it, they are a blast, it was my first swap, owned 7 crx's, 1 ef si hatch, and 2 ew si crx's and trust me a ls ef is a blast and cheap, and personally ive allways been happy with obd0 (easy to check codes, and simple electronics and wiring