I am working on my 99 2500 4x4 and the auto parts supplier I use has a 2002 application guide that lists upper and lower ball joints for a 1998 dana 60 (nothing later than 1998). Question for anyone that has been there done that, not just opinion is if the 1998 parts listed actually are proper replacements for a 1999??? Part #s would really help me verify. Thanx so much.