Well I can't be of much help with the technical stuff, but one of the most appealing things about the Ghias to my mind is the detail touches. The interior lighting is up there with many current model luxury cars around the world, for example.
My suggestion to you would be customising the car's features to your precise tastes, rather than aiming for an EB Ghia wagon replica. This is what I have done, and the result has been an assortment of EA-EL features now and in the future...
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S