Stop in for a cup of coffee

In my spreadsheet I have both a standard and a P-part number that are fairly recent

Right Angle Adapter Gasket Package Engine 4897 939 Mopar Perf P5249320

edit nope>From the 1989 MP catalog an older number P3690884 <edit: nope. That's the full package including the aluminum adapter and bolt.

Maybe you can cross reference them.