$$$ ideas for the truck I'm looking at

What is it going to need to get it roadworthy?

 

we need pic's of truck, location, and phone number so we can look at it ourselves.. lol

 

To properly assess a used truck on Internet forum you are going to need;
-a laptop with said engine mfr diagnosing software and datalink connector
-a decent set of tools
-a pair of coveralls
-to get a little dirty
-and make a whole lot of notes!

Get a good download of the engine history. You want;
-engine abuse history
-current active codes
-current inactive codes
-aftertreatment history
Get a "Repair History" printout from Detroit

With the datalink connected perform as many functionality, fault, and diagnostic tests as possible. (I don't have anything for Detroit except S60 stuff so I'm not sure the capabilities) You defiantly want to perform the following;
-a cylinder cutout test. A proper one, don't cutout one at a time, run the engine on only one cylinder at a time. Yes it will/should. This will tell you health of cylinders and each injector individually
-perform a forced regen on the aftertreatment system. What are the numbers both before and after
-if Detroit's system lets you test the turbo actuator, do that as well.

Remove the rocker cover and inspect the overhead components well. What condition is the cam and followers in? When was the last time an overhead adjustment was done? What clearances are there currently?
Bladder test the engine. Does the CAC or EGR system have any leak?

Use a oil sample vacuum pump and pull an engine oil sample after you have ran the motor long enough for the oil to get over 170*. Pull samples of all the boxes as well. Do any of the boxes have evidence of leaks? Pull the inspection plate and get a good look at the condition of the clutch, does it need to be adjusted?

Now that you've put your coveralls on, perform a DOT Level 1 or Annual Quality Inspection! Record the results of every component inspected.

What make and depth of tread on the tires.

If a seller won't let you do all of this and more, walk away.

As you can see, in order to perform a proper valuation we need a proper mechanical and component assessment. Just because a truck "looks good, clean, and well maintained", doesn't mean it is or has been...watch this as a warning