Soaring, keep in mind that our 71-73 Clydesdales weigh in at 3600+ pounds depending on options. With big horsepower the 200 pound rate springs don't wrap up and allow wheel hop as easily and are a good way to avoid the additional cost of underride traction bars.
And you can buy them with a mid eye to lower the back to standard ride height.
OK, yeah I forgot you guys are carrying a little more weight than I am with my little 65, so maybe the 5 leaves isn't such a bad idea afterall for you guys. You can also run fatter and taller tires than I can. But, the original poster wasn't asking about 71-73 Mustangs. He has a 65.