I have had a few people ask me about fuel pump conversion kits for the 5.9 common fuel rail diesels. 1998 1/2 to 2002, Mopar kit numbers 5179873AB and 68003865AB. You would need to call the dealer and ask them, which one is for a 34 gal tank or 35. 2003 to 2005 Mopar kit numbers 34 gal tank 68003869AB and 35 gal 68003870AB. Just so you know, 1998 was a cut off year for the diesel motors. They still had the 12valve engine and mid year the encore motor came out, which is now the common fuel rail system.