If it happens to be the compressor and you don't want to pay for a brand new one, I've got one used off my 2000 car that should fit over. I can verify the fit before purchase if you decide to go that route.
Rick
The first Blown 3 Liter! "Drive it till the wheels fall off" -my personal motto!!!! 98.5 T-Red SVT #6180 Many Mods Buckshot77@aol.com Owner of 00 #1611 Silver Totalled on 10/7/01 SVT Parts for Sale