870 tuning recommendations

[Sledpuller]

Hello new member here. We plan on purchasing a 2004 Mack cl733 with a 565hp isx. 18speed. I’m not a trucker by occupation. We use our trucks to move our equipment around locally. This truck will be moving one of our excavators primarily. Would be driven by me or my partner 25,000miles a year max. Truck has 385,000miles. Short block replaced at 250,000 miles (spun main) new head 50,000 miles ago. I’m very familiar with turning wrenches and working cummins. We maintain and work on all of our equipment. Not very familiar with isx, though seems easy enough though. Looking to get good solid tuning for power and longevity. I have already Sent a pm to unilevers not sure if that the best way to contact him. I know I have a lot of reading to do and am slowing getting it done. If someone can point me to unilevers or have someone else they would like to recommend I’d appreciate it.

Thanks!