Drop Spring question
 

So I have been doing some research on some drop springs. I found I want the Eibach Sportlines. My question is, how much correction am I looking at for the suspension to being it back to spec. I found this Review of the springs, but doesn't mention what else is needed.

http://www.ft86club.com/forums/showthread.php?t=15079

I did some searching but either my skills suck or I just couldn't find the answer to my question. I would rather get what I need all at once since I am planning on coilovers in about a year when I move. I'm only aiming for about 1 to 1.25 inch in drop. Thanks!