I'm gonna be running 4" Pro comps with a couple mixed in springs, (7 springs total) srung over on my YJ with a D44/D60. I'm gonna have my Np435 mounted level with the frame so it's mounted high, also the axles have not been extended forwards or backwards any yet, I'm wondering what angle the rear should sit at, and what caster the front should be.....I know go and measure..well the axles aren't mounted and the vechiles weight is not resting on the springs...I was told before that for the front around 7-8 caster should be good....not sure on the rear.....flame if ya must!!! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/thefinger.gif" border="0">

Oh, also i'll be running 38.5" swampers.

Caster should be set between 5-7 degrees on the front.
The pinion angle of the rear will depend on the type of shaft you use. A CV shaft will require the pinion to point directly at the ouput of the t case then lower it 2 degrees below to take pinion rise into account. On a normal shaft you have to measure the angle of the output of the t case. Then match the rear pinion angle to it and again 2 degrees below to take into account pinion rise.