Well I don't have many of the mods listed becuase I have the parts, just haven't had the time to install anything. I have a new locker (only LSD) to install, 3" Calmini lift, and possibly on the way, SLR headers (I know, I've read the posts about the CARB exemption problems and extra Heated Air Sensor bungs). I also have a Shrock bumper on the way. The only real reason I was trying to see if anyone had tried the DST ECM upgrade was to find out if they had corrected a change in tire size (I'm either going to 32.7" TSL Thornbirds or 33" BFG A/T KOs) to get an accurate reading out of the speedo. I'm just going to get the Dakota Digital chip and test that one out. Thanks for the response!