Not really... Not unless you want to boost or do nitrous and then need a fuel managment setup... Theres more options for fuel management with OBD1... But otherwise, its not worth the trouble... But even then, theres still plenty of options for OBD0, so even then its probably not worth it... Now a D series VTEC swap into a CRX is a different story... Only worth the trouble if u do convert... But thats only cuz theres no compatible ECU to run those engines in OBD0...