I know for '98 there are two part numbers, pretty sure the difference is whether it's 12 or 24 valve. I would call Mopar4less.com at 800-748-2139 and ask them for the part number. . . they normally ask for the VIN so they should be able to find the right PN no problem. To be sure have them look it up for a '97 too, I think it's the same part number as a '98 12V.
Also when you call ask for Internet Parts, and when the parts guy gives you the price ask if it's the internet price (they are a dealer and will think you're everyday Joe Blow looking for a part). Mopar4less doesn't sell online, gotta call.
Vaughn