I still have tbi heads on for now until the weather gets better and I have a nice set of tuned ports going on. I have a k1102 cam, which didnt like the 4 degrees base I had before I was doggy so I bumped it up to about 8, Now this was before I had the ability to burn chips so as soon as I get my timing light back from a friend I'll move it back down but for now I have most of it compensated for in the base constant.. It has true dual exhaust and a open element filter. I also have a vette servo which is nice. I only added a few degrees throughout, I hear no pinging thus far... I got my 4l60e shift points exactly where I want them and the lockup too, No more standing on it uphill for a downshift.