Are you running manual transmission bro?
If not you can use any of the 4EFTE ECU's to run the 4EFTE so long as the connectors match the loom you are using.
Two plug loom = 1989-1991 Auto 4EFTE and 1989-1995 Manual ECUs
Three plug loom = 1992-1999 Auto 4EFTE and 1996-1999 Manual ECUs
Hope that helps,
Jay