I'm gettig ready to take my SD engine in for service, and in the interest of getting it back in a more correct state, I have a few questions for the Superdutyoligist on this site. When I bought the car in 1991 it had a fresh engine. Of course, it was painted the wrong color. Over the years, I have learned of some other areas that are not correct, mostly relating to the engine. Thus, I need your help! 1. Did the SD have a cast iron or aluminun "gooseneck" on top of the intake manifold? Mine is cast iron. 2. Does the water pump, where the fan clutch mounts, have studs with nuts & lock washers, or bolts with lock washers? 3. The Felpro gaskets (stamped 90123) I have for the intake manifold have a very large crossover heat riser opening that doesn't match the manifold. However, it has the larger size openings that do match up with the SD manifold port openings. Also these gaskets do not appear to have the protruding area near the front that matches the factory original gaskets. Are these gaskets available? If so from who? Felpro? Thanks in advance!
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 When removing an unreplaceable washer, the part will be heard hitting the floor and then vanish from the face of the earth!
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