ISX safe tune?

[Highway50]

Hello, Im new here, Thanks Rawze for letting me join...

So, I have 2013 Pete with isx cummins, i had it mandaded for past 3 years now, and replaced 2 heads, one was faulty from cummins didnt last me a year, warranty covered that, got a replacement, was running great 170k after had to replace all the valves..

so im here to ask recommendation where I can get my a safe mandated tune, maybe dyno tune?

I get great MPG, 7+ loaded 8-9 empty.