i am thinking about putting a 01 prelude engine in my 00 civic ex my question is with wireing if i use a ex harness what things should i look out for? i will use a obd1 ecu and conversion harness for tuning reasons. and i do have to pass emissions so what obd2 ecu should i use? the stock ex one? emissions and wireing are my main issue. i also looked on h/t and did not see anything involving obd2 emissions.