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What would be the easiest way to tune out the air pump and egr, going to LT headers. Oh yeah its a 96 LT1 fairly stock.
Sending your PCM to someone is the easiest way.
If you plan to do more mods in the future then you can buy an OBD II tuning package that works with the Corvette LT1/4. There are two such packages available...TunerCat or LT1 Edit. Note that these are real tuning packages, not the basic "turn on the fans sooner / install a lousy canned timing table" like you get with one of the handheld products.