NEVER EVER USE A BLOCK ON YOUR FRONT AXEL UNLESS ITS OFF ROAD ONLY ,ITS DANGEROUS TO DO THIS!!!!!!!!!!!!!!!!!!!!
Just so you know the cummins 2. 5 inch springs are the same exact springs as the 4 inch gas truck springs from skyjacker. You can usually get the gas truck springs cheaper, even though they're the same. I bought the cummins part number ones, and when I got them I peeled the stickers off and thats when I found the 4 inch gas part number underneath.
The Skyjacker D200CS (2") is the one that will level out the truck nicely. . the 1" one just isn't enough. I learned the hard($)way. . I have the D200CS on my 92 and they REALLY improved the ride as well as the looks. . very easy to change as well...