Truck Repair: n-14 red top cimmings 435E+, head gaskets, owner operator

Question
I will be a new  owner operator soon and the truck I'm buying carries a n-14 red top cummings 435e+.I would like to know if this is a very good engine and if it is good on fuel. I would like all the information on this engine. thank you

Answer
Only few problems with them.Head gaskets blowing because liners too low & camfollower gaskets leaking because bolts get loose but that is not on all of them.They can be uprated probably to a 500 HP if the trans can take it.Fuel milage probably better than 500 HP but depends on the driver's foot.