[Torchie]

Many different ways to lower your Ford.
15" Merc wheels and reversed spring eye as Vic mentioned.
You can also reverse the spring eye on the original spring.
You can also remove leafs from the springpack to lower and also soften the ride.
You can also go with longer shackles to lower as well.
Most of these methods will lower it one inch or so per change so if you are looking for more than that you will have to do a combination of things.
Beware though that if you try to use too long a shackle it can adversely affect
the driveability of your car.
Have fun with it and keep us posted.
Torchie.