So that's be one Skunk 2 OBD1 harness and one skunk2 ECU P72 mod ? If I send in my core then it can't exactly be undone, right ? can I get that mod with a new chip so I can return to 'stock' in the future ?

regarding the VAFC, in an Apexi ok, or is an AEM or similar required ?

Got any vendors you would reccomend ?