Specifically, Speedway mono-leaf front springs. I have one, and back when I got it I did a bit of research and took a slightly educated guess at what the ride height would be. Since then I've managed to loose my notes. At this point all I have is the free height...approximately 3-5/8". Can anyone give me any info on how to figure what the approximate ride height will be, so I can determine the height of perch that will be needed?