Everyone I know that put drag springs on their car had the car sit approx 1/4" HIGHER if they didn't remove a coil from them. A nice compromise would be a set of B springs. They are close to the stock spring rates and give it just enough of a lowered stance. I went with coil overs up front and plan to someday put a set of rear bullitt springs on my car.
instead of drag springs man, you could get some 4 cyl springs from a fox at a junkyard for the front, and some wieghtjacker lower control arms for the back to be used with the stock springs.....they can lower the back of the car about an inch or so, and the 4 cyl springs lower a lil more than an inch.....just about 1.5 inches.....