The Olds windshield was a fairly common swap into those Chevys back in the good old days. From what I remember it was a direct fit using the Olds windshield gasket. The 88 body was based on the Chevy and the 98 was a heavier and larger Olds. The windshields may or may not be exactly the same for the 88 and 98? New gaskets are available from Steele Rubber Products. Hope this is a little help for you.
