intake manifold problem

I just purchased an 1998 aurora of a gal for $300.00. She complains that the oil pan fills up with antifreeze/coolant....I had the same problem with my 1997 riviera and replaced the U.I.M. COULD the aurora have the same problem and where can I get a intake...thanks Rab

Not with the 4.0 Northstar, may be far worse, head gaskets are one possibility.