Fast355, interesting. I would have thought it would basically be similar to having the old school timing off as you adjust the distributor and may run rough due to it being retarded too far. Unfortunately I won't be trying this little experiment, the guy I bought this engine from is going to swap me with a 5.3L like I paid for. But maybe down the road I'll give something like this a try, am having fun learning/working on these newer engines. After I get my bench harness working properly, would like to learn how to tune these. Is there an algorithm table laying around that is/can be used to figure out what tuning parameters to enter to get the desired performance?