Im getting ready to throw a fully built ls into my crx, what Im having complications with obviously is the wiring harness, it is a 89 si, have a 94 ls ecu ob1, guess I need obd0 to obd1 at the ecu correct, you can buy a plug in for that or something ? also need the wiring harness changed on back of engine to make it plug into crx factory one, which company do you suggest, Im thinking place racing right now, any suggestions to whose cheaper or faster. thanks

 

Get an obd-0 to obd-1 conversion harness (someone by the name of blown90hatch sells them) and adapt your original civic SI engine harness to work with the LS motor. There is more to it like swapping injector plugs and dist. plugs (all over to obd-1) but yea. Someone else feel free to comment.