7.3 info needed

[spareparts]

Ferm or any one out there that has any experiance with 7.3 engines. A friend of mine just bought an 03 F250 thats showing 325K on the odometer. He's got a few quirks, but nothing major. The engine has been serviced by a dealer its whole life, recently had a $1200 service. I've heard they had issues with the crankcase vent system, this thing is leaking a little oil from the valve covers and rear main, I figured if the crank wasn't venting properly, it could cause some leaks. I've also heard the intercooler needs to be cleaned out on a high milage truck, especially if the crank case vent isn't workign properly. I know Racor has a specific crank vent system for these trucks that prevents intercooler problems. Any thruth to this? I've had experiance with these engines in Navistar applications, but I know Ford changed some things around on them and I haven't worked on them much.