Last falI I picked up a nice clean '88 VanDura 2500 van to be used for pulling our 16' travel trailer. It's got a TBI 350, 4spd auto (TH400?) and 3.73's. I tucked it away for the winter (to keep it in the condition I found it in!) and plan to use it summers only as a hauler. There's about 90,000 miles on it, and it runs like a watch,*BUT* I've been told that the intake manifold gaskets go on these engines and I should change it as "routine service" on this engine.(The guy also claimed that when this happens coolant is pulled into the bottom end, taking out the bearings. This is when my B.S. detector started alarming.) Regardless, are these intake gaskets prone to leaking "routinely"? Heading for the west coast this July and don't need that ... rather change it now. Thanks from a first time poster.