50blackbird
Registered
You mentioned changing gears. The thing with your 98 is that you don't have a speedo gear in the trans or the output shaft reluctor wheel that inputs to the EEC to calculate your speed. Your vehicle uses the abs sensor for speed input. That means you can change your gearing without needing a new program. Now if you go over 2 steps from your factory gearing I recommend you get an updated program since your vehicle speed vs eng/trans speed will be off enough to cause some shift inconsistencies. Let me know what questions you have.
Is 3.27 to 4.10 2 steps?