My gut tells me it is an odd transition rpm that happens to be where cruise is and is lean. I got great mileage, but it was running hot, and was very hot outside - which I think combined and made additional issues. I like the gear as several of the shows I wish to attend are about an hour or more away on freeway. If I change back to the 3.91 to add rpm and get into the main jets more, then my cruise speed will be greatly reduced. I would like to richen it up at this spot and keep what I have if possible. I have plenty of fuel available with increased throttle position. I also would like to keep the tunnel ram, but I have an Edelbrock torquer 440 intake and 850dp on the shelf. I am hoping I didn't hurt the engine on this trip and want to keep from doing any damage.
