CM871 400HP Dyno sheet

[Vjex]

Hello All,
I'm looking to purchase a used 2010 truck with Cummins Isx 400 hp with 13 speed and 3.58 axle ratio.Truck has 700000 miles.I believe it used to be Knight's Trans truck and tranny has been converted from 9 speed.It runs fine, but if you remove oil filler cap,some smoke is to be seen at idle.Is this dyno sheet legit? 348 at wheels looks good, but 15" blowby concerns me, not to mention torque number (2310 lb-ft) which I think is total bs.This sheet was provided to me by seller. Also, you can see high coolant temperature of 208, and dyno setpoint is at 65.00 - no clue on that. Any input will be greatly appreciated! Thanks!