Better than 57\" F*rD Spring Maybe Okay I was under my neighbors 1999 Ford F150 and I measured his rear springs and I come up with 4 leafs and no overload. The spring is .323" thick and the front spring mount is 3" wide just like the blazer. The bolt size could be larger. Now get this the front spring bolt to center pin is 26.25-26.5" and the rear section is 32". Total lenght is around 58.5" long. I am thinking that you would not have to redrill the springs at all just build a shackle flip or buy one and get the right position. Just some food for thought.