I am going to start changing code for my car. I was wondering which bin I should start with. Should I start with a stock bin from 86 the year of my car, or try to start from an 89 bin. I believe the 89 bin will be the best. Also what xdf file should I load into tuner pro. My feeling is the same for this, the xdf for the 89 is probably th emost recent.

Thanks