Unless the PO had engine work done it was 11.1 350/370 hp when new, Ramblin Fever did good work still a bunch of his Eagles and Prevost around mostly Eagles
As far as I'm aware Dina stopped using the 11.1L in 1997 or 1998. This one is a 1999 so it should be a 12.7.
My VIN is 00916. I have the 11.1L Series 60.