My buddy and I just rebuilt a junkyard 4.2 and swapped it into his '97 F-150 4x4, 5 speed. The motor came out of a 2wd '98 F-150, as I recall. It is all hooked up and bolted together, and we got it running yesterday (though the gas in the tank is 7 years old, so it did not stay running... gotta drain it). The only snafu we have run into are a couple of small hoses T-ed into the heater hoses on top of the motor. We cannot figure out where they go! Sorry, I don't have pics at the moment. I'll try to get some up later. The hoses are about a foot long, each. They are pretty small in diameter, almost like vacuum line small, but there is coolant coming from them. We have simply capped them off for now, but would like to know what they go to. We cannot find any open ports on the manifold. The stock manifold did have a vacuum tree on the back of the passenger side intake runner, which the new one does not have. This does not seem to be where the hoses should hook up, though, as they don't have the right end to them. They also have spring-type hose clamps on them. Anyone have some pics of a stock motor? Thanks.