Wally,run away fast! Those things were crap.period. They ate injector pumps,glow plugs and controllers,cylinder heads and gaskets and broke cranks in two. I have a 91 outside my shop right now with a busted crank. Owner is giving up because of number of major engine failures on this thing. He brought it to me on a referral and i gave him a BIG estimate(engine complete). Then he tells me its his 5th engine,7 heads and gasket failures,2 pumps and so on and so on. Just another fine example of the POS 6.2 I told him. He wants me to convert to a 454 gas motor now. Find another truck and do yourself the favor.