Front doors on all E-Series are interchangable. I'm told that the wagons and long wheelbase models have the same type of rear door, but this is not interchangable with the sedans. EF/EL sedans had different rear doors to EA-ED due to the different C pillar.
Also of note, the ED doors introduced decent side intrusion beams.
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S