I'd love to tune on LT1's but the fact is I can't offer pricing for less then madZ28's...$125 for a full mail tune is hard to beat. I can pound it into peoples head that it wont be near as good as a true tune but in the end its up to the owner to make that determination. I couldnt take a $400 hit for all new software unless I know I'll be able to make my money back