Originally Posted by RandallDee
I forget, what year did the 7.3 switch from naturally aspirated to a turbo?
1988-1992 was N/A IDI (Although it specifically says 1992 for E-Series)
1992-1993 was T/C IDI (And specifically says 1993 for E-series)
1994+ was T/C PSD.
... If you want to believe Wikipedia.
Intercooled and other accessories I believe were different. I don't think it was intercooled until... 1998 or 1999?
Forged bits were... 2001-2002 I think?