If you take a tune from Tunefiledepot, a stock tune, and want to use that tune for a base tune to create tunes for someones truck, what is more important to try to match up. For example, should you try to match the calibration numbers to the persons stock calibration or is the OS more important to try to match up.
I know it is best to use their stock read but if you do not then what is priority, matching calibration or OS or neither? Thank you.