i have a 96 z m6 which is obd2. i think i want to convert to obd1 so i can use tunercat. i am going to start with a mail order but dont really no where to start? i also would like to fine tune myself with a software program and i dont mind reading and researching to learn how. i would also like to know what are the limits of tuning abilities with a program such as tunercat? i would really appreciate any help as i have exhausted all efforts doing a search on my ?'s