Hello! I just recently purchased an '08 C6Z and the car is tuned for E85 only, with no flex fuel sensor installed. It's a h/c/i car and I have little to no E85 stations around me. Looking for some advice on how I could attempt to revert the car to 93 and off E85 completely. It has been tuned with HP Tuners before and I will link the tune file that's on the car currently to this post. I am very mechanically inclined but know little to nothing about how to properly tune. Thank you for any advice/help! -Matt