I have an 04 3500 with some engine mods and now I am looking to do some work to the trans. I know that I want to change the torque converter for sure, is there a lot to be gained by rebuilding and replacing and upgrading the valve body. My truck has 40k and I drive it every day pulling 10k+ at least once a week. I do not want to do anything that will screw up the reliability of my truck. Any suggestions?