Yeah the EL Fairmont Ghia's did come with the Tickford I6HO Motor.
The big difference though Between the Ghia Motor, and the XR6 Motor is the Ghia's got the restrictive and Quiet Exhuast.
Because of this, power is down from the EL XR6 motors.
Anyway, the EFII Ghias, EL Ghias pump out 162Kw, at 4900 RPM.
There are a few ways to tell if the Tickford motor is fitted,
1) On the Ghia's, the 4.0i Sticker on the Front Doors is Gold.
2) The Rocker Cover on the Motor is Red. (Doesnt stop anyone painting, or changing the rocker cover though to pretend).
3) The Tickford Wings are stamped on the Front of the Head of the Motor. (You need to remove the Power Steering Plastic Cover to see if it is there).
Apart from that, all 6cyl EL Fairmont Ghia's have the Tickford Motor. (Unfortunately though, the Ghia's dont get the XR6 3.45 Ratio Diff !)
P.S. Welcome to the Boards !