New Cummins owner, intro and inquiry

[Wiseman]

As far I know , Unilevers is geographically close to you then Gearhead. Distance doesn't matter if you do it remotely. Rawze can do it to , but you have to go to GA.
You can PM and get in touch with them . They'll guide you what to do .
I see you've read something here but that's not enough. You have a lot more reading to do about CM870 and anything else . Needless to say you have to pull at least valve cover off and see what's inside, check turbo , be sure exhaust back pressure tube isn't clogged and whole other things. Get inline5/6 and Insite, dedicated laptop with windows 7 (preferably) , and so one. The more mechanically inclined you're the better . The more you learn the better . The more common sense you have the priceless.
Hope this will get you started .

P.S. Don't ever get fooled how the truck looks on the outside/inside! And where's been kept ! Even records !
Only upon thorough inspection you can see exactly what's ahead and plan accordingly.