Did you like the drop? If so, you could use the Ford Racing strut kit and they would work beautifully together. Thats what im running and have used them on several different cars before. i love Tien springs.
From a numbers standpoint the H's have a nice moderate spring rate 134 lbs/in front and 162 rear and a reasonable lowering of 1.7" f and 1.5" rear. Very similar to Eibach Pros...just a tad softer. Tein makes a very reputable spring, especially when its matched to the correct shock.