I know it does not have enough pinion angle for the super stock springs, 4 degrees is all I can get in it with out cutting the factory spring perches and moving the axle and welding it.
Had the same problem with my car and I installed pinion angle shims. Helped quite a bit. Nice quick and easy $30 fix. Just make sure and buy the steel ones. Seen a lot of problems with aluminum ones cracking. I bought mine on E-bay but if you have a 4x4 driveline shop nearby they should have what you need. They come in different sizes (2 degree, 3 degree, 4 degree, etc) so you can dial it right in. If your switching to Cal-tracs right away don't worry about it but if it's going to be a while the shims will fix you up.