Well, I finally got around to putting my 2.80 upper and Predator tune on the truck last week. I do like the outcome!!! I was running the conservative tune at 16* timing, but then after talking to some of the L guys on the internet I was told that I would be OK to put on the 18* timing tune with the mods that I have. I put the new tune in the truck this morning and I am very pleased with the results. James/RWTD is the man!!!!! I havent heard any pinging/detonation at any of the RPM's and the diagnostics on the Predator read 17*-18* timing/spark advance at WOT. I will surely keep listening to make sure everything is good and I will be getting the L dynoed in a couple of weeks!!!!