Here's the closest I have for your 1996, the 1997 should be the same. Just change your vin, check tire size, gears (this is a 3.42- I think). This is an older tune, the car is now all drag and running different combo.
Just message me if I can help you. You asked for a Great Tune, I'm sure this may not meet that definition, as each car needs to be tuned based on it on modifications, condition and environmental conditions. Just use this as a bases to try or a starting point.
Steve
Try the 97z28 355 cam A4 file, I mistakenly uploaded the earlier file. I went back and looked at the file - timing and fuel is close to stock, some changes were made to MAF scaling and I also think this car has 30# injectors. It's a pretty basic tune, but ran low 12's with a modest build.
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