I was looking at a post where someone put stu hd coils on the rear of the jeep and regular stu coils on the front (thats what I read at least). The Stu HD coils look about 3/4" longer. Are they higher than his regular ones. Whats the difference between the coils he makes and how many types are there. Also, it looked like in the post I read, the jeep that had the HD coils was slightly higher in the back. Can someone help me out on this. I need to know what to get because I am about to buy some coils in October when I get some extra money. Thanks guys.