I have an OBD 2 car, but i have a OBD 1 P28 and the wiring harness to go from OBD 2 to OBD 1, is this all I'll have to do to convert it to OBD 1 and then get the Hondata Chip installed and tuned with bigger injectors. This is seeming too easy, is there a bunch more stuff I have to buy?